Cisco has released three security advisories to address vulnerabilities in Cisco Unified Communications Manager, Unified Presence, and the Content Switching Module. These vulnerabilities may allow an attacker to cause a denial-of-service condition on the affected system.

US-CERT encourages users to review the following Cisco Security Advisories and apply any necessary updates or workarounds:

• Cisco Unified Communications Manager Denial of Service Vulnerabilities - cisco-sa-20080514-cucmdos
• Cisco Unified Presence Denial of Service Vulnerabilities - cisco-sa-20080514-cup
• Cisco Content Switching Module Memory Leak Vulnerability - cisco-sa-20080514-csm

Read more: US-CERT Current Activity