What’s Vulnerable › Vulnerabilities

CVE-2012-3949

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-09-27 · updated 2026-06-16
• Weakness: CWE-20

Description

The SIP implementation in Cisco Unified Communications Manager (CUCM) 6.x and 7.x before 7.1(5b)su5, 8.x before 8.5(1)su4, and 8.6 before 8.6(2a)su1; Cisco IOS 12.2 through 12.4 and 15.0 through 15.2; and Cisco IOS XE 3.3.xSG before 3.3.1SG, 3.4.xS, and 3.5.xS allows remote attackers to cause a denial of service (service crash or device reload) via a crafted SIP message containing an SDP session description, aka Bug IDs CSCtw66721, CSCtj33003, and CSCtw84664.

Affected products

• Cisco IOS: 12.2, 12.2b, 12.2bc, 12.2bw, 12.2bx, 12.2by (+202)
• Cisco IOS XE: 3.3.0sg, 3.3.1s, 3.3.1sg, 3.4.0as, 3.4.0s, 3.4.1s (+7)
• Cisco Unified Communications Manager: 6.0(1a), 6.0(1b), 6.1(1), 6.1(1a), 6.1(1b), 6.1(2) (+33)

References

• http://osvdb.org/85816
• http://secunia.com/advisories/50774
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-cucm
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-sip
• http://www.securityfocus.com/bid/55697
• http://osvdb.org/85816
• http://secunia.com/advisories/50774
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-cucm
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-sip
• http://www.securityfocus.com/bid/55697

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