Cisco TelePresence Multipoint Switch contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition. Updates are not available.
A vulnerability in the Media Snapshot code of Cisco TelePresence Multipoint Switch (CTMS) could allow an authenticated, remote attacker to cause the reload of the affected system, creating a denial of service (DoS) condition.
The vulnerability is due to a failure in handling requests for Media Snapshot while the meeting is terminated. An attacker could exploit this vulnerability by sending continuous requests for Media Snapshot.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, Cisco TelePresence Multipoint Switch versions 1.9 and prior were vulnerable. Later releases of Cisco TelePresence Multipoint Switch may also be vulnerable.
To exploit this vulnerability, an attacker must be able to send continuous requests to the targeted device, which may reside on trusted, internal networks that the attacker would likely need to access. In addition, the attacker must be able to authenticate to the targeted device. These access requirements may reduce the likelihood of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco has released a security notice at the following link: CVE-2013-5516
Customers are advised to consult Cisco bug ID CSCuh44796 for a complete list of affected product versions.
An authenticated, remote attacker could exploit this vulnerability to cause an affected device to reload, resulting in a DoS condition.
The vulnerability is due to improper handling of requests submitted to the Media Snapshot component used by an affected device while terminating a meeting.
An authenticated, remote attacker could exploit this vulnerability by sending continuous requests to the Media Snapshot component used by the targeted device. Successful exploitation could allow the device to reload, creating a DoS condition.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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.