Memory leak in the Session Initiation Protocol (SIP) implementation in Cisco IOS 12.2 through 12.4, when VoIP is configured, allows remote attackers to cause a denial of service (memory consumption and voice-service outage) via unspecified valid SIP messages.
Missing Release of Resource after Effective Lifetime The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.