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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

3.2(9)

Description (partial)

Symptom:
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.

Conditions:
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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