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   SUMMARY
   Name: Potential issue with Ethereal 0.9.5
   
   Docid: enpa-sa-00006
   
   Date: August 20, 2002
   
   Severity: High
   
   DETAILS
   Description:
   
   The ISIS protocol dissector in Ethereal 0.9.5 and earlier versions is
   susceptible to a buffer overflow. In order to determine which version of
   Ethereal you have installed, do one of the following:
   
     * Load Ethereal and go to the Help->About Ethereal... menu item.
     * From the command line run
ethereal -v
       or
tethereal -v
       (the "v" is lowercase").
       
   Either action will display the the application version along with the
   libraries that Ethereal and Tethereal are linked with. If version
   "0.9.5" or prior is displayed, the application is susceptible.
   
   Impact:
   
   It may be possible to make Ethereal crash or hang by injecting a
   purposefully malformed packet onto the wire, or by convincing someone to
   read a malformed packet trace file. It may be possible to make Ethereal
   run arbitrary code by exploiting the buffer and pointer problems.
   
   Resolution:
   
   Upgrade to 0.9.6.
   
   If you are running a version prior to 0.9.6, you can disable the ISIS
   protocol dissector by selecting Edit->Protocols... and deselecting
   "isis" from the list.
   
   
   Support can be found on the ethereal-users[AT]ethereal.com mailing list.
   For corrections/additions/suggestions for this page, please send email
   to: ethereal-web[AT]ethereal.com
   Last modified: Tue, August 20 2002.