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7.8
CVE-2011-2072: Cisco IOS and CUCM may crash from malformed SIP messages
CVE-2011-2072 · published 15 years ago
Summary
Cisco routers and Unified Communications Manager versions listed can run out of memory and restart when they receive a specially crafted SIP call request. This can make phone services unavailable until the device is rebooted. Apply the vendor’s recommended updates or patches to stop the issue.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| cisco | ios |
12.4 15.0 15.1 cpe:2.3:o:cisco:ios:12.4:*:*:*:*:*:*:* |
| cisco | ios_xe |
2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.6.2 3.1.0s 3.1.1s 3.1.2s 3.1.3s 3.1.4s 3.2.0s 2 more version ranges
cpe:2.3:o:cisco:ios_xe:2.5.0:*:*:*:*:*:*:* |
| cisco | unified_communications_manager |
6.0 6.1\(1\) 6.1\(1a\) 6.1\(1b\) 6.1\(2\) 6.1\(2\)su1 6.1\(2\)su1a 6.1\(3\) 6.1\(3a\) 6.1\(3b\) 6.1\(3b\)su1 6.1\(4\) 45 more version ranges
cpe:2.3:a:cisco:unified_communications_manager:6.0:*:*:*:*:*:*:* |
Original advisory text
Memory leak in Cisco IOS 12.4, 15.0, and 15.1, Cisco IOS XE 2.5.x through 3.2.x, and Cisco Unified Communications Manager (CUCM) 6.x and 7.x before 7.1(5b)su4, 8.x before 8.5(1)su2, and 8.6 before ...
Memory leak in Cisco IOS 12.4, 15.0, and 15.1, Cisco IOS XE 2.5.x through 3.2.x, and Cisco Unified Communications Manager (CUCM) 6.x and 7.x before 7.1(5b)su4, 8.x before 8.5(1)su2, and 8.6 before 8.6(1) allows remote attackers to cause a denial of service (memory consumption and device reload or process failure) via a malformed SIP message, aka Bug IDs CSCtl86047 and CSCto88686.
References
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20...
- http://tools.cisco.com/security/center/viewAlert.x?alertId=24129
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d58.s... Vendor Advisory
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d5a.s... Vendor Advisory
- http://www.securitytracker.com/id?1026110
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker partial control (estimated)
Severity
7.8
High
Type
CWE-399Resource Management Errors
Timeline
Published3 Oct 2011
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2011-2072 · NVD
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