CVE-2009-2051
CVE-2009-2051 is a high-severity vulnerability in Cisco Unified Communications Manager with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 7.8)
- EPSS exploit prediction: 3% (88th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Cisco Unified Communications Manager
- Published:
- Last modified:
Description
Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), and 7.x before 7.1(2) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a malformed SIP INVITE message that triggers an improper call to the sipSafeStrlen function, aka Bug IDs CSCsz40392 and CSCsz43987.
Frequently asked questions
- What is CVE-2009-2051?
- Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), and 7.x before 7.1(2) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a malformed SIP INVITE message that triggers an improper call to the sipSafeStrlen function, aka Bug IDs CSCsz40392 and CSCsz43987.
- How severe is CVE-2009-2051?
- CVE-2009-2051 has a CVSS 2.0 base score of 7.8, rated high severity.
- Is CVE-2009-2051 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-2051?
- CVE-2009-2051 primarily affects Cisco Unified Communications Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2009-2051?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2009-2051 published?
- CVE-2009-2051 was published on 2009-08-27 and last updated on 2026-06-16.
References
- http://osvdb.org/57453
- http://secunia.com/advisories/36498
- http://secunia.com/advisories/36499
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtml
- http://www.securityfocus.com/bid/36152
- http://www.securitytracker.com/id?1022775
Affected products (3)
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
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