资源说明:the famous wireless network detector, sniffer, and intrusion detection system
Kismet 2011-03-R2 Mike Kershawhttp://www.kismetwireless.net 1. What is Kismet 2. Upgrading from earlier versions 3. Quick start 4. Suidroot & security 5. Capture sources 6. Caveats & quirks for specific drivers 7. Supported capture sources 8. Plugins 9. GPS 10. Logging 11. Filtering 12. Alerts & IDS 13. Server configuration options 14. Kismet UI 15. Kismet drones 16. Talking to Kismet 17. Troubleshooting 18. Frequently asked questions 1. What is Kismet Kismet is an 802.11 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring mode, and can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic (devices and drivers permitting). Kismet also sports a plugin architecture allowing for additional non-802.11 protocols to be decoded. Kismet identifies networks by passively collecting packets and detecting networks, which allows it to detect (and given time, expose the names of) hidden networks and the presence of non-beaconing networks via data traffic. 2a. Upgrading from recent versions 2009-06-R1 has changed some basic behavior when using multi-vap capable devices (ie, modern in-kernel Linux drivers). Whenever possible, it will create a new VAP and reconfigure it, instead of modifying the existing interface. To preserve the old behavior, specify 'forcevap=false' on the source line. 2b. Upgrading from Kismet-old versions This release marks a MAJOR change in how Kismet works and is configured. While many aspects are similar, many others (the client, configuring sources and channels, etc) are very different. To take advantage of the new features, replace your existing configuration files with the latest configuration data. Most notably: * Sources are defined differently. See the "Capture Sources" section. * All UI configuration is handled inside the Kismet client and stored in the users home directory in ~/.kismet/kismet_ui.conf * Most situations which were previously fatal conditions which caused Kismet to exit can now be recovered from. * New filtering options * New alert options * Completely new UI * Revamped network protocol * Significantly less CPU used for high numbers of networks * Plugins While this release breaks almost everything from previous releases, it opens the door for smoother upgrades and major feature enhancements. 3. Quick start PLEASE read the full manual, but for the impatient, here is the BARE MINIMUM needed to get Kismet working: * Download Kismet from http://www.kismetwireless.net/download.shtml * Run "./configure". Pay attention to the output! If Kismet cannot find all the headers and libraries it needs, major functionality may be missing. Most notably, compiling Kismet yourself will require the development packages and headers, usually called foo-dev or foo-devel. * Make sure that all the functionality you need was enabled properly in configure. Almost all users will need pcap and libnl support for proper operation. * Compile Kismet with "make". * Install Kismet with either "make install" or "make suidinstall". YOU MUST READ THE "SUID INSTALLATION & SECURITY" SECTION OF THE README OR YOUR SYSTEM MAY BE INSECURE. * If you have installed Kismet as suid-root, add your user to the "kismet" group * Run "kismet". If you did not install Kismet with suid-root support, you need to start it as root in nearly all situations. This is not recommended as it is less secure than privsep mode, where packet processing is segregated from admin rights. * When prompted to start the Kismet server, choose "Yes" * When prompted to add a capture interface, add your wireless interface. In nearly all cases, Kismet will autodetect the device type and supported channels. If it does not, you will have to manually define the capture type (as explained later in this README) * Logs will be stored in the directory you started Kismet from, unless changed via the "logprefix" config file or "--log-prefix" startup option. * READ THE REST OF THIS README. Kismet has a lot of features and a lot of configuration options, to get the most out of it you should read all of the documentation. 3b. Windows quick start * Note, at the time of this writing, the updated CACE install is not yet * available, so users wishing to take advantage of the newcore * functionality will need to build Kismet themselves in Cygwin Using the CACE Package: * Download the Win32/Cygwin installer created by CACE and linked from the download page (http://www.kismetwireless.net/download.shtml * Run the installer * Start Kismet * Pick your AirPcap or Kismet Drone sources * READ THE READ OF THIS README. Compiling it yourself: * Download the Cygwin setup tool (http://www.cygwin.org) * Install Cygwin with make, GCC, libncurses, libncurses-dev * Download the Airpcap_Devpack from CACE Support * Put Airpcap_Devpack and Libpcap_Devpack in the kismet source directory * Run "./configure", adding the options: --with-airpcap-devpack=... --with-winpcap-devpack=... --enable-airpcap The airpcap/winpcap devpack is available from the CACE website. Due to bugs in Cygwin, it appears that the airpcap and winpcap directories must be inside the kismet source directory. If they are not, the Kismet binary will immediately exit with no output. * Compile Kismet with "make". * Install Kismet with "make install" NOTE: KISMET WILL **ONLY** WORK WITH THE CACE AIRPCAP DEVICE, SAVED PCAP FILES, -OR- REMOTE KISMET DRONES RUNNING ON A SUPPORTED PLATFORM. NO OTHER HARDWARE IS SUPPORTED IN WINDOWS, PERIOD. WINDOWS DRIVERS DO NOT INCLUDE SUPPORT FOR WIFI MONITORING WHICH KISMET REQUIRES. THERE IS NO WAY TO CHANGE THIS. 3c. OSX/Darwin quick start * Please note: Many have complained that iTerm does not send correct key events. However, Terminal.app appears to work fine, and is recommended for using Kismet. * Download Kismet from http://www.kismetwireless.net/download.shtml * Run "./configure". Pay attention to the output! If Kismet cannot find all the headers and libraries it needs, major functionality may be missing. Notably, you may need to install libpcap manually. The libpcap included with OSX does not support PPI logging. Kismet will not be able to log to PPI correctly (so it will log 802.11 packets with no per-packet headers.) Configure will automatically detect OSX and default to the group "staff" for OSX suidinstall. This may be overridden with the '--with-suidgroup' configure option. * Compile Kismet with "make". * Install Kismet with either "make install" or "make suidinstall". YOU MUST READ THE "SUID INSTALLATION & SECURITY" SECTION OF THE README OR YOUR SYSTEM MAY BE VULNERABLE. * If you have installed Kismet as suid-root, add your user to the "staff" group if it is not already. * Run "kismet". If you did not install Kismet with suid-root support, you need to start it as root in nearly all situations. This is not recommended as it is less secure than privsep mode, where packet processing is segregated from admin rights. * When prompted to start the Kismet server, choose "Yes" * When prompted to add a capture interface, add your wireless interface. In nearly all cases, Kismet will autodetect the device type and supported channels. If it does not, you will have to manually define the capture type (as explained later in this README) For many Macs, this will be 'en1', however start a terminal and check the output of "ifconfig -a". The wireless interface must be enabled in the wireless control panel for Kismet to work, otherwise it will not find any networks. Kismet currently ONLY works with the Airport wireless devices, NOT USB WIRELESS DEVICES. * Logs will be stored in the directory you started Kismet from, unless changed via the "logprefix" config file or "--log-prefix" startup option. * READ THE REST OF THIS README 4. Suidroot & Security In order to configure the wireless card for monitor mode and start capturing packets, Kismet needs root access. There are two ways to accomplish this: Start Kismet as root, or install it so that the control components are set to start as root. Starting Kismet as root means that Kismet will continue running as root. In theory this presents no additional risk, however if there are any flaws in the Kismet packet dissection code then it may be possible for a malicious packet to cause code execution as root. Additionally, third-party plugins will run as root, and may not be secure. Installing Kismet as suid-root creates a limited-functionality binary (kismet_capture) which is only launchable by members of the "kismet" group. Kismet uses this to configure cards and control the channels, while packet decoding happens only in the user component, significantly limiting the attack surface. Distributions are strongly encouraged to use this method as it allows standard group controls for what users can use Kismet to change card states. Embedded systems typically have much less storage space and RAM, and often do not enforce user/root separation as strictly due to these limitations. On embedded systems, Kismet may be installed without the kismet_capture binary and run in root mode only, however the above risks still apply. Under no situation should the kismet_server binary itself be set suidroot as this will bypass any security checks. 5. Capture sources All packets in Kismet come from a capture source. Capture sources are typically network cards on the local system, however they can also be a previously recorded file or a remote capture system running a Kismet drone. Kismet will, in most cases, autodetect the driver and supported channels for a capture source given only the network interface. For many users this will be sufficient, however many expanded options are available for capture sources. Kismet captures packets at the 802.11 layer. This requires changing the mode of the network interface, making it unavailable for normal use. In most cases it is not possible to remain associated to a wireless network while running Kismet on the same interface. Capture sources may be added via the Kismet UI under the "Add Source" option, in which case the options may be added under the "Options:" field, comma separated. They may also be defined in the kismet.conf configuration file as the "ncsource=" option, such as: ncsource=wlan0:option1=foo,option2=bar Source options: name=foo Custom name for the source (otherwise it will be named the same as the capture interface). This is completely arbitrary and meaningful only to the user. type=foo Sources which can not autodetect the type must have the type specified. This is rarely necessary. Additional information on supported source types follows. uuid=foo Users wishing a static unique identifier on sources may specify one here. This is not necessary for most users. UUID is of the format: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX hop=true|false Disable channel hopping on this source. Default behavior is for channel sources to hop channels to cover the entire spectrum. velocity=# Channel hop velocity (number of channels per second), Kismet can hop 1-10 channels per second. dwell=# Channel dwell time, the number of seconds Kismet will wait on each channel. If hopping is enabled and a channel dwell time is specified, Kismet will hop at N seconds per channel, instead of N channels per second. channellist=name Use an alternate channel list instead of the autodetected list of channels supported by this interface. The channellist must be defined. split=true|false When multiple sources use the same channel list (either autodetected or by the channellist= option) Kismet will split them so that they do not cover the same channels at the same time. Sources can be forced to ignore this and begin hopping at the beginning of the channel list regardless of overlap. retry=true|false Kismet will attempt to re-open a capture source which has encountered an error. This behavior can be disabled if the user wants the source to remain closed. vap=interface Create a secondary named interface for capture instead of trying to change the mode of the existing interface. This is primarily only for use by drivers using the mac80211 interface under Linux. Users wishing to do Kismet+Managed or Kismet+Injection should create a vap. forcevap=t|f True/False. Force creation of a monitor-mode VAP when possible (all Linux mac80211 based drivers support this). Default is "true", a VAP will be made of the name ' mon', ie 'wlan0mon', 'wlan1mon' and capture will be done with this VAP. This behavior can be forced OFF with 'forcevap=false'. wpa_scan=time When using a mac80211 VAP, Kismet can use wpa_supplicant on a managed interface to trigger hardware assisted scans, enabling some view of the rest of the spectrum without significantly disrupting operation of the managed VAP. Suggested time for scan intervals is 15 seconds. validatefcs=t|f True/False. Kismet normally will not bother trying to validate the FCS checksum of incoming packets because most drivers only report valid frames in the first place. Packet sources which report invalid frames by default will enable this option automatically. If the drivers have been manually configured to report invalid packets, this should be specified to prevent Kismet from processing broken packets. fcs=true|false Force handling of FCS bytes on a packet source. Default is "false", which implies "native FCS handling". Packet sources which include per-packet headers like radiotap or PPI will ignore this value as the FCS is encoded in the radio header. Packet sources such as pcapfile, reading raw 802.11 pcap files with no headers, may need this turned on for proper behavior. fcsfail=true Force a mac80211 VAP to report packets with a known bad FCS (packet checksum). This is only available on Linux and only when using mac80211 drivers. This MUST come after a 'vap=' option or it will be ignored. Enabling 'fcsfail' will enable 'validatefcs' automatically. The 'fcsfail' option should only be enabled when logging to PPI; Logging to normal PCAP will not preserve the FCS data and will produce unreadable output. WARNING: With some driver versions, enabling this seems to cause kernel OOPS warnings and the interface will become unresponsive if capture is stopped and resume. This option is for specific expert use only, when in doubt, leave it alone. plcpfail=true Force a mac80211 VAP to report packets which do not pass the PLCP check (if possible on that interface). The same warnings and conditions as 'fcsfail' apply. This option is for specific, expert use only, when in doubt, leave it alone. Example sources (these are given as config file parameters, however they will work equally well as command-line options, ie "-c wlan0"): Capture on wlan0, channel 6, don't channel hop ncsource=wlan0:hop=false,channel=6 Capture on wlan0, 802.11b channels only even if it supports 5GHz ncsource=wlan0:channellist=IEEE80211b Create a VAP on wlan0 named wlan0mon and use wpa_supplicant to give us some view of other channels, while remaining associated to a network: ncsource=wlan0:vap=wlan0mon,hop=false,wpa_scan=15 Read from a pre-recorded pcap file: ncsource=/home/foo/old.pcap Capture using the first Airpcap device on Windows ncsource=airpcap Capture using a remote capture drone ncsource=drone:host=10.10.100.2,port=2502 Channel lists: Channel lists control the channels and patterns hopped to by capture sources in Kismet, when the channels can not be autodetected (or when the user wishes to override them for some reason). The default channel lists (IEEE80211b, IEEE80211a, and IEEE80211ab) are used only when a channel list is not provided by the driver, so should not be changed in most cases. When the channel list is automatically created from the channels supported by the driver, the preferredchannels= option will control which channels are weighted for extra time. By setting this to channels known to be defaults (such as 1, 6, 11) or channels with known networks of interest (such as in a stationary install), Kismet will devote more time to those channels to gather more information. For more complex channel timing, keep reading about how channel lists work. Channels can typically be specified as IEEE channels (11, 36, etc) or as frequencies (2401, 5200) however some platforms and drivers may not support specifying channels or frequencies out of the IEEE standard range. channellist=name:channel,channel,channel Additionally, individual channels in the list can be weighted so that more time is spent on them; for a weighting value of 3, 3x more time is spent on that channel. channellist=foo:1:3,6:3,11:3,2,3,4,5,6,7,8,9,10 Up to 256 channels may be specified in a channel list. For greater numbers of channels, a range must be specified. Ranges may consist of channels or of frequencies. channellist=name:range-[start]-[end]-[overlap]-[iteration] Channels between start and end, at a given iteration. Kismet will not hop directly between channels that overlap. channellist=foo:range-1-11-3-1 A similar range using frequencies (802.11 2.4GHz channels are ~20MHz wide; technically 22 but 20 suffices, and 5 MHz apart). channellist=foo:range-2412-2462-20-5 Ranges are NOT split between sources. Multiple sources hopping on the same channel list which includes a range will not split the expanded range - in other words, channel ranges are treated as a single channel entry. Multiple ranges can be specified in a single channel list, separated by commas. They may also be mixed with channels: channellist=foo:range-1-11-3-1,36,52 6. Caveats and quirks for specific drivers: Mac80211 General (Linux): At the time of this release, the mac80211 drivers in Linux are undergoing significant development, which means at any given time they can exhibit extremely odd behavior or be outright broken. Users are encouraged to upgrade to the latest kernel, and to consider installing the compat-wireless backport package, if problems are experienced. Madwifi (Linux): Madwifi-ng has been largely deprecated by ath5k/ath9k for normal usage. These drivers support multi-vap more cleanly via the mac80211 layer and do not, typically, have the same problems historically present in madwifi. Madwifi-ng sources can be specified as either the VAP (ath0, mon0, etc) or as the control interface (wifi0, wifi1). However, IF THE CONTROL INTERFACE IS SPECIFIED, Kismet cannot extract the list of supported channels, and will default to IEEE80211b channels. Madwifi-ng continues to have problems with multi-vap and initial vap creation. It is recommended that the initial VAP creation be turned off by the module parameter "autocreate=none" when loading ath_pci. If the madwifi monitor vap stops reporting packets soon after being created, this is often the cause. Combining managed and monitor VAPs appears to still not work well. RT28xx (Linux) There are 2 drivers for the RT28xx chipsets. The in-kernel driver available as of Linux-2.6.31 works properly with Kismet. This is by far the preferred driver to use. Be sure to enable the RT28xx driver in the wireless drivers section, NOT the staging driver. The staging driver is not mac80211 based and will not necessarily behave. The out-of-kernel driver does not conform to mac80211 controls. This driver also cannot be auto-detected (they don't provide a valid identifier in /sys) so the driver type mus be manually specified with 'type=rt2870sta' on the source line. This driver defaults to the name 'rausbX' which exposes a bug in some versions of libpcap and may require the device be renamed (See 'Troubleshooting' section) rt73-k2wrlz (Linux) An out-of-tree rt73 driver similar to rt2870sta. It may be necessary to specify a type of 'rt73' manually when using this driver. This driver defaults to the name 'rausbX' which exposes a bug in some versions of libpcap and may require the device be renamed (See 'Troubleshooting' section) WL (Linux, Intel) Broadcom has released a binary version of their drivers called WL. These drivers are incapable of monitor mode, and cannot be used with Kismet. Kismet will attempt to autodetect them and report this to the user. Users of Broadcom cards should use the b43 or b43xx in-kernel drivers. OTUS (Linux) Atheros released a driver for the 802.11n USB devices; however, this does not have support for monitor mode and cannot be used with Kismet. The ar9170 driver project is providing mac80211 kernel support for this card, and works with Kismet. ar9170 has been merged with the wireless-git development kernel and should be present in the compat-wireless packages. Nokia ITT (Linux) For any chance of Kismet working on the Nokia ITT, the scan interval must be set to zero in the Nokia system control panel, connectivity section. It should be disconnected from any network, but wireless must be turned on. The Nokia drivers often return FCS-invalid packets. The Nokia source line should include 'fcs=true,validatefcs=true' to prevent these from creating multiple false networks out of invalid packets. The Nokia device does not autodetect properly, a driver type of 'nokia770', 'nokia800', 'nokia810', or 'nokiaitt' must be set. 'nokiaitt' is a generic source which should work on any Nokia ITT tablet. Orinoco (Linux) Due to problems in monitor mode with newer firmwares, the Orinoco kernel drivers have disabled monitor mode for newer/"modern" firmware versions in the Orinoco cards. Kismet will attempt to use the device, but warn the user that it will probably fail. Monitor support can be forced on in the module via the module parameter "force_monitor=1" when loading orinoco.ko. For non-hermes chipsets like prism2, use hostap (also in the kernel). NDISWrapper (Linux) The NDIS-Wrapper driver loads Windows drivers into the Linux network stack. These drivers are not capable of monitor mode, and will not work with Kismet. Note: The rndis drivers are NOT the same as ndiswrapper. rndis drivers are for a specific USB chipset and are not related to ndiswrapper, rndis will work. BSD (BSD Generic) Cards which work under the generic BSD framework for monitor mode with radiotap headers should work with Kismet via the source types "radiotap_bsd_ag", "radiotap_bsd_a", "radiotap_bsd_g", and "radiotap_bsd". Channel detection and device type autodetection are currently not supported. ncsource=wl0:type=radiotap_bsd_ag Windows (Generic) ONLY THE AIRPCAP DEVICE IS SUPPORTED UNDER WINDOWS. THIS IS A SPECIFIC HARDWARE DEVICE MADE BY CACE TECHNOLOGIES. IF YOU DID NOT GO AND BUY AN AIRPCAP SPECIFICALLY FOR CAPTURING DATA, YOU DO NOT HAVE ONE, AND THIS WILL NOT WORK. The Airpcap has monitor mode drivers with a *public* interface for controlling them. This is the only device Kismet can capture packets from on Windows. AirPcap (Windows) By default Kismet will open the first Airpcap device found. Multiple devices can be opened by using the full named interface, which can be found in the AirPcap tools but follows the pattern \\.\airpcapXX ; The first device is \\.\airpcap00, the second is \\.\airpcap01, and so on. USB Devices (OSX) Only devices using the Airport IOKit drivers are supported on OSX. USB devices are, in general, not supported because the drivers lack monitor mode or a method to set the channel. 7. Supported capture source types Capture source types are only required in specific situations where Kismet cannot detect the capture source type automatically. Linux Capture Sources: All modern drivers on Linux use the mac80211 driver framework. Kismet will auto-detect any driver using this framework. A generic source type 'mac80211' can be used for forcing a type, however it is not strictly useful to do so. adm8211 Kernel adm8211 driver acx100 Kernel acx100 driver hostap Kernel prism2 driver ipw2100 Kernel Intel 2100 driver ipw2200 Kernel Intel 2200 driver ipw2915 Kernel Intel 2915 driver ipw3945 Kernel intel 3945 driver mac80211 Generic mac80211 catch-all source for any mac80211 drivers. madwifi Madwifi/Madwifi-ng madwifi_a Alias for madwifi, default 802.11a channels madwifi_b Alias for madwifi, default 802.11b/g channels madwifi_g Alias for madwifi, default 802.11b/g channels madwifi_ag Alias for madwifi, default 802.11abg channels nokia770 Conexant-based driver in Nokia Maemo tablets nokia800 Alias for nokia770 nokia810 Alias for nokia770 nokiaitt Alias for nokia770 pcapfile Pcap-formatted previously recorded file rt2870sta Out-of-kernel/Staging rt2870 11n driver (use in-kernel instead) wl12xx Patched wl12xx drivers for the N900, must use patched drivers from http://david.gnedt.eu/blog/, otherwise autodetected. drone Remote Kismet packet capture, source options "host=..." and "port=..." are required. ncsource=drone:host=localhost,port=2502 BSD Capture Sources: Currently, the BSD packet capture sources do not support autodetection or channel detection. Capture on BSD should work with any driver which supports monitor mode and which uses the standard BSD IOCTLs to set the mode and channel. Patches/Additional BSD support welcome. radiotap_bsd Generic BSD capture source, default 802.11b/g channels radiotap_bsd_g Default 802.11b/g channels radiotap_bsd_a Default 802.11a channels radiotap_bsd_ag Default 802.11abg channels pcapfile Pcap-formatted previously recorded file drone Remote Kismet packet capture, source options "host=..." and "port=..." are required. Windows Capture Sources: Currently ONLY THE AIRPCAP DEVICE, PCAP FILE, AND DRONES RUNNING ON A SUPPORTED PLATFORM are supported under Windows. NO OTHER DEVICES CAN BE USED FOR PACKET CAPTURE. airpcap Airpcap generic source. Will autodetect the channel ranges. Interface 'airpcap' will detect the first airpcap device (ncsource=airpcap), interface paths may be used to specify specific devices (ncsource=\\.\airpcap01) airpcap_ask List available sources and ask which one to use. Should NOT be used when launched by the Kismet UI. pcapfile Pcap-formatted previously recorded file drone Remote Kismet packet capture, source options "host=..." and "port=..." are required. OSX/Macintosh Capture Sources: darwin Any device controlled by the Airport IOKit drivers under OSX. Default 802.11b/g channels. pcapfile Pcap-formatted previously recorded file drone Remote Kismet packet capture, source options "host=..." and "port=..." are required. 8. Plugins Kismet plugins can do almost anything that the native Kismet process can do. This includes extending the logging capability, adding IDS alerts, defining new capture sources (within some limitations), and adding new features to the Kismet UI. Plugins need access to the Kismet source (and configuration information) to compile, and should ALWAYS be recompiled when the Kismet version changes (for those using Kismet-SVN development code, this may require rebuilding plugins every time a checkout is done). Plugins bundled with Kismet (and third-party plugins extracted into the Kismet source dir) can be built with 'make plugins' and installed with 'make plugins-install' or 'make plugins-userinstall'. These commands will automatically configure the plugin to compile using the current Kismet source directory, for third-party plugins compiled outside of the tree (or for manually compiling plugins), the KIS_SRC_DIR variable must be set or the symlinks to the Kismet source must be set up properly (see the README for the plugin you are trying to compile for more information). Plugins for the Kismet server (capture and logging process) are loaded from the system-wide plugin directory (/usr/local/lib/kismet/ by default) or from the users Kismet settings directory (~/.kismet/plugins). When running Kismet with privilege separation enabled (installed kismet_capture as root), plugins are only loaded by the Kismet server process and not the root-level Kismet capture process, and plugins cannot perform tasks that require root privileges. When running Kismet without privilege separation (launching as root), plugins run with root privileges. This is not recommended. Server plugins are only loaded when kismet.conf contains: allowplugins=true Client plugins are loaded from the system-wide plugin directory (/usr/local/lib/kismet_client by default) or from the users Kismet settings directory (~/.kismet/client_plugins). The Kismet UI provides mechanisms for loading plugins (and specifying plugins to be loaded automatically on startup) via the Plugins menu item. Once a Kismet UI plugin is loaded, it cannot be unloaded. To unload a Kismet plugin, go to the Plugins window, configure the plugin to not load on start, and restart Kismet. To configure plugin loading in the UI, select the plugin (the list is automatically generated from plugins installed in the system and user plugin directories) and press enter. Plugins will be loaded when the plugin window is closed. Kismet server plugins cannot currently be manipulated via the Kismet UI, but loaded plugins will be displayed. If a plugin causes startup problems (most likely because it was compiled for a different Kismet binary), Kismet will exit and explain which plugin caused the crash during startup. Plugins may also cause instability during runtime; if runtime crashes occur while plugins are loaded, remove them and re-test. Often, recompiling the plugins against the running Kismet source will help resolve these issues. 9. GPS Kismet can integrate with a GPS device to provide coordinates for networks it has detected. These can be logged to the pcap file when PPI logging is enabled, and to an XML file for processing with Kismap, included with the Kismet source, as well as other third-party tools. Kismet can use the GPS network daemon 'gpsd', or can parse NMEA directly from the GPS unit. The GPS is controlled with the Kismet server config, kismet.conf. For using gpsd with gpsd running on the local system: gps=true gpstype=gpsd gpshost=localhost:2947 gpsmodelock=false gpsreconnect=true By specifying gpsreconnect, if gpsd crashes or Kismet otherwises looses its connection, it will be re-established. Gpsmodelock compensates for certain broken GPS/GPSd combinations, where the GPS never reports a valid lock. By forcing a gpsmodelock=true, Kismet assumes the GPS always has a 2d lock. For using a GPS device without gpsd: gps=true gpstype=serial gpsdevice=/dev/ttyS0 gpsreconnect=true The gpsdevice parameter should be set to the proper serial device for your GPS. For USB GPS devices this will typically be /dev/ttyUSB0, and for bluetooth devices this will often by /dev/rfcomm0 or similar. Check the output of "dmesg" after plugging in your device. Kismet cannot know the location of a network, it can only know the location where it saw a signal. By circling the suspected location, you can provide more GPS data for processing the network center point. Kismet keeps running averages of the network location, however this is not incredibly accurate, due to averaging and imprecision in floating point math. For plotting network locations, the GPSXML file should be used. 10. Logging By default Kismet will log the pcap file, gps log, alerts, and network log in XML and plaintext. Logs are controlled by the --log-types command-line option or the logtypes= config file line. Logs are enabled by name (nettxt, gpsxml, etc) or by class (text, pcap, etc). When enabled by class, Kismet will enable all logs of that class. For example, enabling 'pcap' will turn on pcap logging for plugins which can save packets. Supported log classes: alert IDS alerts gps GPS data (xml) text Text-formatted records (nettxt, etc) xml XML-formatted records (netxml) pcap Pcap-formatted packet logs string Discovered strings By default, Kismet will try to log to pcapfiles using the PPI per-packet header. The PPI header is a well-documented header supported by Wireshark and other tools, which can contain spectrum data, radio data such as signal and noise levels, and GPS data. PPI is only available with recent libpcap versions. When it is not available, Kismet will fall back to standard 802.11 format with no extra headers. The pcap logging format is controlled by: pcapdumpformat=ppi or pcapdumpformat=80211 The naming of logfiles is controlled by the "logtemplate" configuration option. By default, Kismet logs in the directory it is started in (unless modified with the "--log-prefix" option). The following variables can be used in the logtemplate: %p Prefix (as given by --log-prefix) %n Logging name (as given by --log-title) %d Starting date, Mmm-DD-YYYY %D Starting date, YYYYMMDD %t Starting time, HH-MM-SS %T Starting time, HHMMSS %i Incremental, in the case of multiple logs of the same name %I Incremental, padded with zeroes (00001) %l Log type (pcapdump, netxml, etc) %h Home directory of the user Kismet was started as The log template with a --log-prefix of /tmp and a --log-title of Kismet would expand from: logtemplate=%p%n-%D-%t-%i.%l to (for example): /tmp/Kismet-20090428-12-45-33-1.pcapdump Nested directories may be used (for example, with a template of the form "%p/%l/%D-%t"), however they must be created prior to starting Kismet, Kismet will not create the directories itself. Most users should never need to change the logtemplate, however the option remains available. When changing the template, be sure to include the "%p" prefix option in a logical location (ie, at the beginning of the template) or else the --log-prefix argument will not function as expected. 11. Filtering Kismet supports basic filtering; networks can be excluded from tracking, pcap logging, or general logging, based on BSSID, source, or destination MAC addresses. Filters, when enabled, are "positive-pass"; anything matched by the filter will be allowed, and all other matches are excluded. To process ONLY packets to or from the network with the BSSID AA:BB:CC:DD:EE:FF: filter_tracker=BSSID(AA:BB:CC:DD:EE:FF) This behavior can be inverted by using the '!' operator. To exclude packets to or from the BSSID AA:BB:CC:DD:EE:FF: filter_tracker=BSSID(!AA:BB:CC:DD:EE:FF) Multiple MAC addresses can be stacked on the same filter line, to filter two all packets from AA:BB:CC:DD:EE:FF and 00:11:22:33:44:55: filter_tracker=BSSID(!AA:BB:CC:DD:EE:FF,!00:11:22:33:44:55) MAC addresses may also be masked in a fashion similar to IP netmasks; to process only networks of a single manufacturer: filter_tracker=BSSID(AA:BB:CC:00:00:00/FF:FF:FF:00:00:00) Similarly, SOURCE(...), DEST(...), and ANY(...) may be used to filter packets. To process only packets FROM the MAC address 11:22:33:44:55:66: filter_tracker=SOURCE(11:22:33:44:55:66) 12. Alerts & IDS Kismet includes IDS functionality, providing a stateless and stateful IDS for layer 2 and layer 3 wireless attacks. Kismet can alert on fingerprints (specific single-packet attacks) and trends (unusual probes, disassociation floods, etc). Kismet can integrate with other tools using the tun/tap export to provide a virtual network interface of wireless traffic; tools such as Packet-o-Matic and Snort can use this exported data to perform additional IDS functions. Kismet as an IDS is most effective in a stationary (ie, non-wardriving) setup, and for best results, a non-hopping source should be available on the channels the primary networks are on. Kismet IDS functions CAN be used in mobile or channel-hopping installations (and are turned on by default) but accuracy may suffer. Alerts are configured with the "alert=" configuration option in kismet.conf, and have two time parameters: Throttle, and Burst. The throttle option controls how many alerts are allowed total per time unit, while the burst option controls how many alerts are allowed in a row. For example: alert=NETSTUMBLER,5/min,1/sec Will allow 1 alert per second, at a maximum of 5 per minute. Kismet supports the following alerts, where applicable the WVE (Wireless Vulnerability and Exploits, http://www.wve.org) ID is included: ADVCRYPTO Trend/Stateful 802.11 An 802.11 AP changed advertised encryption options. This may be a normal configuration change (though unlikely) or it may indicate a spoofed AP which did not correctly clone the original. AIRJACKSSID Fingerprint 802.11 Deprecated The original 802.11 hacking tools, Airjack, set the initial SSID to 'airjack' when starting up. This alert is no longer relevant as the Airjack tools have long since been discontinued. APSPOOF Fingerprint 802.11 A list of valid MAC addresses for a SSID may be given via the 'apspoof=' configuration file option. If a beacon or probe response for that SSID is seen from a MAC address not in that list, this alert will be raised. This can be used to detect conflicting access points, spoofed access points, or attacks such as Karma/Airbase which respond to all probe requests. The 'apspoof=' configuration option can specific exact SSID matches, regular expressions (if Kismet is compiled with PCRE support), and single, multiple, or masked MAC addresses: apspoof=Foo1:ssidregex="(?i:foobar)",validmacs=00:11:22:33:44:55 apspoof=Foo2:ssid="Foobar", validmacs="00:11:22:33:44:55,AA:BB:CC:DD:EE:FF" When multiple MAC addresses are specified, they should be enclosed in quotes (as above). For more information about forming PCRE-compatible regular expressions, see the PCRE docs (man pcrepattern). BEACONRATE Trend/Stateful 802.11 An 802.11 AP changed advertised beacon rates. This may be a normal configuration change (though unlikely) or it may indicate a spoofed AP which did not correctly clone the original. BSSTIMESTAMP Trend/Stateful 802.11 Invalid/Out-of-sequence BSS Timestamps can indicate AP spoofing. APs with fluctuating BSS timestamps could be suffering an "evil twin" spoofing attack, as many tools do not attempt to sync the BSS timestamp at all, and the fine-grained nature of the BSS timestamp field makes it difficult to spoof accurately. Some APs may reset the BSS timestamp regularly, leading to a false-positive. References: WVE-2005-0019 CHANCHANGE Trend/Stateful 802.11 A previously detected access point changing channels may indicate a spoofing attack. By spoofing a legitimate AP on a different channel, an attacker can lure clients to the spoofed access point. An AP changing channel during normal operation may indicate such an attack is in process, however centrally managed networks may automatically change AP channels to less-used areas of the spectrum. References: WVE-2005-0019 CRYPTODROP Trend/Stateful 802.11 Spoofing an AP with less-secure encryption options may fool clients into connecting with compromised credentials. The only situation in which an access point should reduce encryption security is when the AP is reconfigured. DEAUTHFLOOD Trend/Stateful 802.11 BCASTDISCON Trend/Stateful 802.11 By spoofing disassociate and deauthenticate packets an attacker may disconnect clients from a network, causing a denial-of-service which lasts only as long as the attacker is able to send the packets. References: WVE-2005-0019, WVE-2005-0045, WVE-2005-0046, WVE-2005-0061 http://802.11ninja.net http://home.jwu.edu/jwright/papers/l2-wlan-ids.pdf DHCPCLIENTID Fingerprint 802.11 A client which sends a DHCP DISCOVER packet containing a Client-ID tag (Tag 61) which doesn't match the source MAC of the packet may be doing a DHCP denial-of-service to exhaust the DHCP pool. DHCPCONFLICT Trend/Stateful 802.11 Clients which receive a DHCP address and continue to use a different IP address may indicate a misconfigured or spoofed client. DISASSOCTRAFFIC Trend/Stateful 802.11 A client which is disassociated from a network should not immediately continue exchanging data. This can indicate a spoofed client attempting to incorrectly inject data into a network, or can indicate a client being the victim of a denial-of-service attack. DISCONCODEINVALID Fingerprint 802.11 DEAUTHCODEINVALID Fingerprint 802.11 The 802.11 specification defines valid reason codes for disconnect and deauthenticate events. Various client and access point drivers have been reported to improperly handle invalid/undefined reason codes. DHCPNAMECHANGE Trend/Stateful 802.11 DHCPOSCHANGE Trend/Stateful 802.11 The DHCP configuration protocol allows clients to optionally put the hostname and DHCP client vendor/operating system in the DHCP Discover packet. These values should only change if the client has changed drastically (such as a dual-boot system). Changing values can often indicate a client spoofing/MAC cloning attack. DOT11D Trend/Stateful 802.11 An 802.11 AP changed advertised 802.11d settings. This may be a normal configuration change (though unlikely) or it may indicate a spoofed AP which did not correctly clone the original. 802.11d changes may also be an active attack meant to confuse clients or alter their behavior. LONGSSID Fingerprint 802.11 The 802.11 specification allows a maximum of 32 bytes for the SSID. Over-sized SSIDs are indicative of an attack attempting to exploit vulnerabilities in several drivers. LUCENTTEST Fingerprint 802.11 Deprecated Old Lucent Orinoco cards in certain scanning test modes generate identifiable packets. MALFORMMGMT Fingerprint 802.11 Malformed management frames may indicate errors in the capture source (such as not discarding corrupted packets), but may also be indicative of an attack. MSFBCOMSSID Fingerprint 802.11 Some versions of the Windows Broadcom wireless drivers do not properly handle SSID fields longer than the 802.11 specification, leading to system compromise and code execution. This vulnerability is exploited by the Metasploit framework. References: WVE-2006-0071 MSFDLINKRATE Fingerprint 802.11 Some versions of the Windows D-Link wireless drivers do not properly handle extremely long 802.11 valid rate fields, leading to system compromise and code execution. This vulnerability is exploited by the Metasploit framework. References: WVE-2006-0072 MSFNETGEARBEACON Fingerprint 802.11 Some versions of the Windows netgear wireless drivers do not properly handle over-sized beacon frames, leading to system compromise and code execution. This vulnerability is exploited by the Metasploit framework. NETSTUMBLER Fingerprint 802.11 Deprecated Older versions of Netstumbler (3.22, 3.23, 3.30) generate, in certain conditions, specific packets. NULLPROBERESP Fingerprint 802.11 Probe-response packets with a SSID IE tag component of length 0 can cause older cards (prism2, orinoco, airport-classic) to fail. References: WVE-2005-0019 WPSBRUTE Trend/Stateful 802.11 WPS is vulnerable to a brute-force attack which can reveal the WPS key in a matter of hours. An AP under attack will send an unusual number of WPS responses. This vulnerability is documented in the paper by Stefan Viehbock and implemented in his tool and the Reaver attack tool. References: http://sviehb.files.wordpress.com/2011/12/viehboeck_wps.pdf 13. Other Configuration Kismet is divided into two main processes: kismet_server and kismet_client. The server portion (responsible for capture, logging, and decoding) is controlled by kismet.conf (by default in /usr/local/etc) and the client is configured via preferences options. For the most part, Kismet can run with no additional configuration by adding capture sources runtime with the UI, however for standalone/headless operation or advanced configuration, users will want to edit the config file. The Kismet config is a plain text file with option=value pairs. Lines beginning with # are considered comments and are ignored. Most configuration options are self-explanatory or documented in the config file itself. By default Kismet only listens to the loopback interface on port 2501. This may be changed: listen=tcp://ip:port Define the IP and port Kismet listens on. By default, for security reasons, Kismet will listen only on 127.0.0.1, the loopback interface. To listen on any interface, use the IP 0.0.0.0. allowedhosts=... Comma-separated list of IP addresses allowed to connect to the Kismet server. IP ranges may be specified with netmasks (ie 10.10.10.0/24) maxclients=N Maximum number of clients allowed to simultaneously connect to the Kismet server. maxbacklog=5000 Maximum number of backlogged "lines" the server keeps for clients which are not keeping up with the network protocol. This also affects the amount of RAM potentially used by the Kismet server process, and may need to be lowered on extremely RAM-limited systems. Kismet servers may also be configured to act as Kismet drones, exporting a TCP stream of live packets: dronelisten=.. Same as above, for drone capabilities droneallowedhosts=.. ... dronemaxclients=.. ... droneringlen=65535 Equivalent of maxbacklog for Kismet clients, maximum amount of space used for backlogged packets as a drone. May be reduced on extremely RAM-limited systems. Kismet can export packets directly to other tools by creating a virtual network interface (supported on Linux, minimal support on OSX and BSD due to limited tuntap driver implementations on these platforms): tuntap_export=true Enable tuntap export tuntap_device=kistap0 Virtual network interface created Kismet can decrypt WEP networks for which the WEP key is already known: wepkey=bssid,hexkey Only the hex key can be given, since there is no consistent method to turn a pass-phrase into a hex key for WEP for different vendors. Sound and speech can be generated by the Kismet server, however typically this would be done by the Kismet UI instead. Sound is disabled by default in the Kismet server: enablesound=true|false Play sound soundbin=... Path and options for sound player binary sound=xxx,true|false Enable playing sound trigger xxx enablespeech=true|false Speak speechbin=... Text-to-Speech player speechtype=raw|festival If using Festival (but NOT flite) speech type must be set to 'festival', all other tools should be set to 'raw' speechencoding=... NATO, Spelling, Speech. Encoding of speech fields for clarity, spell network SSIDs as NATO, spelled-out letters, or speak them normally. speech=xxx,"format" Format of spoken strings, see the Kismet UI section for more information on formatting of speech strings. The OUI file (used by Kismet to determine the manufacturer of a device) can be shared with other tools (such as Wireshark), so long as they use a compatible format. By default, Kismet searches: /etc/manuf /usr/share/wireshark/wireshark/manuf /usr/share/wireshark/manuf Additional search paths can be added with the 'ouifile=' configuration option. 14. Kismet UI The default Kismet UI uses the text-based ncurses library. Additional UIs may be available from the Links page on the Kismet website (http://www.kismetwireless.net/links.shtml) The Kismet UI functions much as any other curses application (such as Midnight Commander or Links) does. The menu is activated with 'escape', '`' or '~'. Navigation between elements of the UI is done with 'tab'. Use of a mouse is supported in much of the Kismet UI, although not all widgets fully support mouse operation. Basic use of the UI with no keyboard should be reasonable, however. The main Kismet window consists of the network list, GPS information, a summary of the current server statistics and packet source status, and the status panel where errors and announcements are printed. Additional components of the main window may be turned on with the 'View' menu. - Preferences Configuration of the Kismet UI is done entirely inside the UI via the 'Kismet->Preferences->...' menus. Preference changes are (for the most part) immediate and do not require restarting. By default, the Kismet UI will prompt on startup to launch the Kismet server, this behavior (as well as auto-connection and server setup) can be changed via the Startup and Shutdown preferences (Kismet->Preferences->Startup and Shutdown): Open Kismet server launch window automatically - Kismet will open the server startup window when the UI is loaded, if the default server is not running. Ask about launching server on startup - Ask to start a server (instead of just opening the server window) Show Kismet server console by default - Automatically open the Kismet server console window after starting the server Shut down Kismet server on exit automatically - Kill locally started servers and issue a shutdown command to remote servers when the UI exits Prompt before shutting down Kismet server - Don't kill servers without confirming Kismet menus support shortcuts, for example '~Wl' is the same as navigating to the 'Windows->Client List' menu option. - Sound and Speech The Kismet UI handles sound and speech playing for most users. Sound playing is straightforward (WAV files are installed, by default, to /usr/local/share/kismet/wav) and can be played with any sound player compatible with your install. Speech is supported on Festival and Flite. Any other text-to-speech program should work as long as it accepts plain text on standard in. Speech text is encoded depending on the type of speech event, where %1, %2, etc are replaced with data by Kismet. The supported events and replacements are: New network: 1. Network SSID encoded to speech encoding setting (spell, nato, plain) 2. Network channel 3. Network BSSID Alert: 1. Alert type GPS Lost, GPS Lock: No replacement options - Tagging networks Kismet can add custom data to a network in the form of tags. In the Kismet UI, networks and clients can both have tags added to them. These tags are displayed in the UI under network details, and logged to XML and TXT output. Tags can be set as permanent; By checking the "Remember note when restarting Kismet" checkbox in the Network and Client Note windows, the note is saved and will be re-applied to networks every time Kismet loads. Client tags are applied to a specific client in a specific network; Currently there is no mechanism for adding a note to every instance of the client. - Sorting Kismet defaults to "autofit" mode, where it tries to put as many of the currently active networks on the screen as possible. Because autofit mode is so variable, it doesn't make sense to try to allow selecting networks in autofit. To select a network and view details, first sort by another method (such as channel, time, etc) via the Sort menu, then select a network. 15. Kismet Drones Kismet Drones are designed to turn Kismet into a distributed IDS system. Drones support all of the capture methods Kismet normally supports, including multiple capture devices per drone. Drones capture wireless data and forward to a Kismet server over a secondary connection (ie, wired Ethernet). Drones do not do any decoding of packets and have minimal hardware requirements. A Kismet server connects to the drones and will provide a single Kismet UI display, packet dump, and alert generation point. Capture sources on remote Kismet drones are forwarded to the Kismet server and appear as independent capture devices which can be configured for channel hopping, locking, etc. Using the tun/tap export function, the central Kismet server can export the packets from all attached drones to a virtual network interface for use with external IDS/packet capture systems (such as Snort). To start using Drones, launch the kismet_drone process on a remote system (editing the kismet_drone.conf file to control what hosts are allowed to connect) or turn on drone capabilities in the Kismet server (by enabling the drone config options in kismet_server.conf). When running a kismet_server instance as a drone, local logging will act as usual and Kismet clients can be connected to the server as normal; When running kismet_drone, Kismet clients cannot connect directly to it, and it will not log, a Kismet server instance must be started to provide packet decoding, logging, and Kismet UI connectivity. 16. Talking to Kismet The Kismet client/server protocol is basic text. Communicating with Kismet can be as simple as using telnet or netcat, however writing a full protocol dissector is suggested for serious applications. This documents a simple case of the Kismet protocol and the basics of communicating with a Kismet server, however for detailed information the source should be consulted. A more complete documentation of the protocol will be done at some point. The Kismet protocol consists of commands and response sentences. A command is of the form: !ID COMMAND OPT1 OPT2 OPT3 Where ID is a number (which for proper error detection should be unique) and the remainder of the arguments are the command and any options it may take. Options which contain spaces but should be treated as a single argument should wrap those options in "\001...\001" And a response sentence is of the form: *HEADER: f1 f2 f3 f4 Where HEADER is the sentence type, and the remainder are fields requested by the client, in the order they were requested. Fields are expected to be plain ASCII text, however a client should take precautions to be sure that the value is sane for the terminal before printing it. Fields which may contain a space (used as the separator character) are buffered with \001...\001. As this could be any field, any protocol parser should be able to handle fields so buffered. Basic Kismet commands include: !{#} SHUTDOWN Shutdown Kismet instance !{#} CAPABILITY {Sentence} Query the accept fields for a protocol. Returns the *CAPABILITY sentence !{#} ENABLE {Sentence} {Fields}|{*} Enable a sentence, with either the provided fields and order, or all fields in the default order if * is specified. !{#} REMOVE {Sentence} Remove a sentence. Stop sending a sentence. !{#} ADDNETTAG {BSSID} {Permanent} {Tag name} {Tag content} Add an arbitrary tag to a network. If permanent, it will be cached in ~/.kismet/tags.conf !{#} DELNETTAG {BSSID} {Tag name} Remove a tag !{#} ADDCLITAG {BSSID} {MAC} {Permanent} {Tag} {Content} Add tag to specified client in network !{#} DELCLITAG {BSSID} {MAC} {Tag} Remove a tag !{#} ADDSOURCE {source line} Add a source dynamically. Source line should be of the same format as a 'ncsource=' config line Protocol sentences: When a sentence is enabled, any existing sentence data is sent (at the discretion of the protocol handlers). Additional data is sent in the form of deltas; To conserve bandwidth and processing time, only instances where the data has changed are sent. For example, when the *BSSID sentence is sent, a block of *BSSID records are sent, for all networks previously detected by Kismet. Until the sentence is disabled, a record is sent once per second for each network which has changed in some fashion (new packets). Mandatory sentences: Kismet expects a client to support AT LEAST the following mandatory protocols, which are enabled by default. At the very least, any client should ignore these if it does not process them. They may be disabled with the REMOVE command. In general, any client should ignore protocols it does not understand. *KISMET Basic Kismet startup info *PROTOCOLS List of supported sentences *ACK Command response *ERROR Command failure *TIME Server timestamp Example: echo -e '\n!0 enable channel channel,networks' | nc localhost 2501 Enable the *CHANNEL sentence with the fields 'channel' and 'networks'. The output could look something like: *ACK: 0 OK *CHANNEL: 1 4 *CHANNEL: 3 1 *CHANNEL: 4 1 *TIME: 12451
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