CVE-2012-1315: Memory leak in the SIP inspection feature in the Zone-Based Firewall in Cisco IOS 12.4, 15.0, 15.1, and 15....

Security readout for executives and security teams

This flaw can make certain Cisco IOS devices run out of memory or reload when they inspect specially crafted SIP traffic. The business impact is availability: affected routers or firewalls could disrupt voice or network services if they sit in a SIP traffic path. Exposure is likely limited to Cisco IOS devices on affected trains with Zone-Based Firewall SIP inspection enabled and handling transit SIP traffic. Systems not inspecting SIP through ZBFW are not shown as affected by the provided sources. Prioritize remediation for internet-facing or critical voice-path devices. This is primarily an availability risk, not a confidentiality issue, but device reloads can still cause business-impacting outages. Mitigation focus: Review the Cisco advisory for fixed IOS releases and official workarounds.; Upgrade affected Cisco IOS devices according to vendor guidance.; Limit SIP transit exposure to trusted paths where operationally feasible..

Prepared

Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.