CVE-2008-1743

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2008-05-16 · updated 2026-06-16
Weakness: CWE-399

Description

Memory leak in the Certificate Trust List (CTL) Provider service in Cisco Unified Communications Manager (CUCM) 5.x before 5.1(3) and 6.x before 6.1(1) allows remote attackers to cause a denial of service (memory consumption and service interruption) via a series of malformed TCP packets, aka Bug ID CSCsi98433.

Affected products

Cisco Unified Communications Manager: from 5.0 before 5.1\(3\); from 6.0 before 6.1\(1\) — fixed in 5.1\(3\), 6.1\(1\)

How to fix

Upgrade to a fixed version: Cisco Unified Communications Manager 5.1\(3\), 6.1\(1\). Check the vendor advisory for mitigations.

References

http://secunia.com/advisories/30238
http://securitytracker.com/id?1020022
http://www.cisco.com/en/US/products/products_security_advisory09186a0080995688.shtml
http://www.securityfocus.com/bid/29221
http://www.vupen.com/english/advisories/2008/1533
https://exchange.xforce.ibmcloud.com/vulnerabilities/42414
http://secunia.com/advisories/30238
http://securitytracker.com/id?1020022
http://www.cisco.com/en/US/products/products_security_advisory09186a0080995688.shtml
http://www.securityfocus.com/bid/29221
http://www.vupen.com/english/advisories/2008/1533
https://exchange.xforce.ibmcloud.com/vulnerabilities/42414

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