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Wireshark is the world's most popular network protocol analyzer. It is used for troubleshooting, analysis, development, and education.
The following vulnerabilities have been fixed. See the security advisory for details and a workaround.
Wireshark is vulnerable to DLL hijacking as described in Microsoft Security Advisory 2269637. This problem is fully fixed on Windows XP SP1 and later. It is partially fixed on Windows 2000 and XP without service packs. We expect to address those platforms in future releases. If you are running Wireshark on Windows 2000 or XP we recommend that you only open capture files within Wireshark. (Bug 5133)
Versions affected: All previous Windows versions up to and including 1.0.15 and 1.2.10.
Wireshark source code and installation packages are available from http://www.wireshark.org/download/.
Most Linux and Unix vendors supply their own Wireshark packages. You can usually install or upgrade Wireshark using the package management system specific to that platform. A list of third-party packages can be found on the download page on the Wireshark web site.
Wireshark and TShark look in several different locations for preference files, plugins, SNMP MIBS, and RADIUS dictionaries. These locations vary from platform to platform. You can use About->Folders to find the default locations on your system.
Wireshark may appear offscreen on multi-monitor Windows systems. (Bug 553)
Wireshark might make your system disassociate from a wireless network on OS X. (Bug 1315)
Dumpcap might not quit if Wireshark or TShark crashes. (Bug 1419)
The BER dissector might infinitely loop. (Bug 1516)
Wireshark can't dynamically update the packet list. This means that host name resolutions above a certain response time threshold won't show up in the packet list. (Bug 1605)
Capture filters aren't applied when capturing from named pipes. (Bug 1814)
Wireshark might freeze when reading from a pipe. (Bug 2082)
Capturing from named pipes might be delayed on Windows. (Bug 2200)
Filtering tshark captures with display filters (-R) no longer works. (Bug 2234)
Community support is available on the wireshark-users mailing list. Subscription information and archives for all of Wireshark's mailing lists can be found on the web site.
Commercial support and development services are available from CACE Technologies.
A complete FAQ is available on the Wireshark web site.