What’s Vulnerable › Vulnerabilities

CVE-2009-2052

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-08-27 · updated 2026-06-16

Description

Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to "tracking of network connections," aka Bug IDs CSCsq22534 and CSCsw52371.

Affected products

• Cisco Unified Communications Manager: from 5.0 before 5.1\(3g\); from 6.1\(1\) before 6.1\(4\); from 7.0 before 7.0\(2\); from 7.1 before 7.1\(2\) — fixed in 5.1\(3g\), 6.1\(4\), 7.0\(2\), 7.1\(2\)

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 5.1\(3g\), 6.1\(4\), 7.0\(2\), 7.1\(2\). Check the vendor advisory for mitigations.

References

• http://secunia.com/advisories/36498
• http://secunia.com/advisories/36499
• http://secunia.com/advisories/37039
• http://securitytracker.com/id?1023018
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080afc930.shtml
• http://www.securityfocus.com/bid/36152
• http://www.securityfocus.com/bid/36676
• http://www.securitytracker.com/id?1022775
• http://www.vupen.com/english/advisories/2009/2915
• http://secunia.com/advisories/36498
• http://secunia.com/advisories/36499

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