Wireshark 0.99.6 fixes the following vulnerabilities:

• Wireshark could crash when dissecting an HTTP chunked response. (Bug )
  Versions affected: 0.99.5
• On some systems, Wireshark could crash while reading iSeries capture files. (Bug )
  Versions affected: 0.10.14 to 0.99.5
• Wireshark could exhaust system memory while reading a malformed DCP ETSI packet. (Bug )
  Versions affected: 0.99.5
• Wireshark could loop excessively while reading a malformed SSL packet. (Bug )
  Versions affected: 0.8.20 to 0.99.5
• The DHCP/BOOTP dissector was susceptible to an off-by-one error. (Bug )
  Versions affected: 0.10.17 to 0.99.5
• Wireshark could loop excessively while reading a malformed MMS packet. (Bug )
  Versions affected: 0.10.12 to 0.99.5

Impact

It may be possible to make Wireshark or Ethereal crash or use up available memory by injecting a purposefully malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

Resolution

Upgrade to Wireshark 0.99.6.

If are running Wireshark 0.99.5 or Ethereal 0.99.0 or earlier and cannot upgrade, you can work around each of the problems listed above by doing the following:

• Disable the HTTP, DCP ETSI, SSL, DHCP/BOOTP, and MMS dissectors.
  • Select Analyze→Enabled Protocols... from the menu.
  • Make sure "HTTP", "DCP (ETSI)", "SSL", "BOOTP/DHCP", and "MMS" are un-checked.
  • Click "Save", then click "OK".