Cisco Unified Presence contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition. Updates are available.
The XML parser of Cisco Unified Presence contains a vulnerability that could allow an authenticated, remote attacker to trigger a crash of the jabberd process, causing a denial of service condition.
The vulnerability is due to insufficient validation of crafted XML in Extensible Messaging and Presence Protocol (XMPP) messages. An attacker could exploit this vulnerability by sending crafted XMPP messages to the affected system.
Cisco has confirmed the vulnerability in a security notice and software updates available.
At the time this alert was first published, Cisco Unified Presence versions 9.5 and prior were vulnerable. Later versions of Cisco Unified Presence may also be affected.
To exploit this vulnerability, the attacker must be able to authenticate to a targeted system. This access restriction limits the possibility of a successful exploit.
Customers are advised to review the bug report in the Vendor Announcements section for a current list of affected versions.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An authenticated, remote attacker could exploit this vulnerability to cause the jabberd process to crash, resulting in a denial of service (DoS) condition.
The vulnerability is due to insufficient validation of user-supplied input processed by the XML parser used by the affected software.
An authenticated, remote attacker could exploit this vulnerability by sending crafted XMPP messages to an affected system. If successful, the attacker could cause the jabberd process on the targeted system to crash, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at email@example.com for assistance.
The security vulnerability applies to the following combinations of products.
Cisco Unified Presence Server
9.0 Base | 9.5 Base
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.