Cisco IOS Software Session Initiation Protocol Denial of Service Vulnerabilities

Multiple vulnerabilities exist in the Session Initiation Protocol (SIP) implementation in Cisco IOS Software and Cisco IOS XE Software that could allow an unauthenticated, remote attacker to cause a reload of an affected device or trigger memory leaks that may result in system instabilities. Affected devices would need to be configured to process SIP messages for these vulnerabilities to be exploitable.

Cisco Unified Communications Manager Session Initiation Protocol Memory Leak Vulnerability

Cisco Unified Communications Manager contains a memory leak vulnerability that could be triggered through the processing of malformed Session Initiation Protocol (SIP) messages. Exploitation of this vulnerability could cause an interruption of voice services. Cisco has released free software updates for supported Cisco Unified Communications Manager versions to address the vulnerability. A workaround exists for this SIP vulnerability.

Jabber Extensible Communications Platform and Cisco Unified Presence XML Denial of Service Vulnerability

A denial of service (DoS) vulnerability exists in Jabber Extensible Communications Platform (Jabber XCP) and Cisco Unified Presence. An unauthenticated, remote attacker could exploit this vulnerability by sending malicious XML to an affected server. Successful exploitation of this vulnerability could cause elevated memory and CPU utilization, resulting in memory exhaustion and process crashes. Repeated exploitation could result in a sustained DoS condition.


The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers. (CVSS:7.5) (Last Update:2012-11-05)