CVE-2009-2051

Name: CVE-2009-2051
Creator: NVD / NIST
Published: 2009-08-27T17:00:00.953+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.44%

Last modified Jun 16, 2026

CVE-2009-2051 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.44% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

3.44%

87.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Unified Communications Manager	>= 5.0, < 5.1\(3g\)
Cisco	Unified Communications Manager	>= 6.1\(1\), < 6.1\(4\)
Cisco	Unified Communications Manager	>= 7.1, < 7.1\(2\)
Cisco	Ios	>= 12.2, <= 12.4
Cisco	Ios	>= 15.0, <= 15.1
Cisco	Ios Xe	>= 2.5.0, <= 2.6.1

References

http://osvdb.org/57453Broken Link
http://secunia.com/advisories/36498Third Party Advisory
http://secunia.com/advisories/36499Third Party Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtmlPatch, Vendor Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtmlVendor Advisory
http://www.securityfocus.com/bid/36152Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022775Third Party Advisory, VDB Entry
http://osvdb.org/57453Broken Link
http://secunia.com/advisories/36498Third Party Advisory
http://secunia.com/advisories/36499Third Party Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtmlPatch, Vendor Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a30f.shtmlVendor Advisory
http://www.securityfocus.com/bid/36152Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1022775Third Party Advisory, VDB Entry

Timeline

Published: Aug 27, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-2051?

How severe is CVE-2009-2051?

Severity scoring for CVE-2009-2051 is pending analysis. The EPSS model estimates a 3.44% probability of exploitation in the next 30 days.

How do I fix CVE-2009-2051?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-2051?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST