cisco-sa-20180815-ucmimps-dos: Cisco Unified Communications Manager IM & Presence Service Denial of Service Vulnerability
A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM&P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos
Credit
Affected Software
Event History
Frequently Asked Questions
What is the severity of cisco-sa-20180815-ucmimps-dos?
The severity of cisco-sa-20180815-ucmimps-dos is classified as high due to the potential for a remote attacker to cause a temporary service outage.
How do I fix cisco-sa-20180815-ucmimps-dos?
To fix cisco-sa-20180815-ucmimps-dos, upgrade to versions 11.5(1)SU4 or higher for CUCM IM&P or to version X8.11 for TelePresence VCS and Expressway.
What products are affected by cisco-sa-20180815-ucmimps-dos?
cisco-sa-20180815-ucmimps-dos affects the Cisco Unified Communications Manager IM & Presence Service and Cisco TelePresence Video Communication Server.
Can an attacker cause a denial of service using cisco-sa-20180815-ucmimps-dos?
Yes, an unauthenticated remote attacker can exploit cisco-sa-20180815-ucmimps-dos to cause a denial of service condition.
What versions of software are vulnerable to cisco-sa-20180815-ucmimps-dos?
Versions prior to 11.5(1)SU4 for CUCM IM&P and earlier than X8.11 for TelePresence VCS and Expressway are vulnerable to cisco-sa-20180815-ucmimps-dos.