CVE-2011-2561 - CVE House
Back to Database
Status published High CVE-2011-2561

The SIP process in Cisco Unified Communications Manager (aka CUCM,...

Vulnerability Description

The SIP process in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 7.x before 7.1(5b)su4 and 8.x before 8.0(1) does not properly handle SDP data within a SIP call in certain situations related to use of the g729ar8 codec for a Media Termination Point (MTP), which allows remote attackers to cause a denial of service (service outage) via a crafted call, aka Bug ID CSCtc61990.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2011-2561

Credits & Attribution

No credits recorded in the NVD database.

References

More from cisco

View All →
CVE-2025-27091
OpenH264 Decoding Functions Heap Overflow Vulnerability
High 8.6
CVE-2023-25653
Improper calculations in ECC implementation can trigger a Denial-of-Service (DoS)
High 7.5
CVE-2021-33478
The TrustZone implementation in certain Broadcom MediaxChange firmware could allow...
Medium 6.8
CVE-2020-16139
A denial-of-service in Cisco Unified IP Conference Station 7937G 1-4-4-0...
High 7.5
CVE-2020-16138
A denial-of-service issue in Cisco Unified IP Conference Station 7937G...
High 7.5

Affected Vendor

Affected Software

unified communications manager
Vulnerable Versions:
7.0\(1\)su1, 7.0\(1\)su1a, 7.0\(2\), 7.0\(2a\), 7.0\(2a\)su1, 7.0\(2a\)su2, 7.1\(2a\), 7.1\(2a\)su1, 7.1\(2b\), 7.1\(2b\)su1, 7.1\(3\), 7.1\(3a\), 7.1\(3a\)su1, 7.1\(3a\)su1a, 7.1\(3b\), 7.1\(3b\)su1, 7.1\(3b\)su2, 7.1\(5\), 7.1\(5\)su1, 7.1\(5\)su1a, 7.1\(5a\), 7.1\(5b\), 7.1\(5b\)su1, 7.1\(5b\)su1a, 7.1\(5b\)su2, 7.1\(5b\)su3, 8.0

Timeline

Official Publish: August 29th, 2011
Last Modified: September 17th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.