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Cisco Bug: CSCta44761 - FWSM - SIP inspection treats User-agent Version number as IP address

Last Modified

Feb 22, 2014

Products (1)

  • Cisco Catalyst 6500 Series Firewall Services Module

Known Affected Releases


Description (partial)

FWSM SIP inspection engines treats User-agent version numbers as IP addresses and enforces requirements that would normally apply to legitimate IP addresses in the SIP payload such as routing and translations.

This has been seen in FWSM version 3.2.9 and presumably earlier versions as well with SIP traffic containing a series of four numbers separated by .'s
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