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Cisco Unified Communications Manager IM and Presence Service SIP Packet Processing Denial of Service Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
A vulnerability in Session Initiation Protocol (SIP) processing functions of the Cisco Unified Communications Manager Instant Messaging (IM) and Presence Service could allow an unauthenticated, remote attacker to cause the Cisco SIP Proxy Daemon (sipd) process to restart unexpectedly, resulting in a denial of service (DoS) condition on a targeted system.
Insight
Insight
The vulnerability is due to improper input validation of SIP packet headers. An attacker could exploit this vulnerability by sending a crafted SIP packet to a targeted system. A successful exploit could allow the attacker to cause the sipd process to restart unexpectedly, resulting in a DoS condition on the system. If the sipd process restarts repeatedly, a successful exploit could also result in a sustained DoS condition and cause high disk utilization due to a large number of sipd core files being written to disk, which could exacerbate the DoS condition.
Affected Software
Affected Software
Versions 9.1(1) SU6, 9.1(1) SU6a, 9.1(1) SU7, 10.5(2) SU2, 10.5(2) SU2a, 11.0(1) SU1, and 11.5(1)
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.