Cisco TelePresence Manager, Multipoint Switch, and Recording Server contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
Cisco TelePresence Manager, Multipoint Switch, and Recording Server contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted device.
The vulnerability is due to improper processing of malformed network traffic by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending malicious network requests to the device at a high rate. If successful, the attacker could cause the device to stop responding to legitimate user requests, resulting in a DoS condition.
Cisco has confirmed the vulnerability in multiple security advisories and released software updates.
The following Cisco TelePresence products are affected:
Cisco TelePresence Multipoint Switch versions prior to 1.8.1
Cisco TelePresence Manager versions prior to 1.9.0
Cisco TelePresence Recording Server versions 1.6 and prior, 1.7, and 1.8
A successful exploit could allow an attacker to cause a device to stop responding, potentially preventing authorized users from accessing network resources served by the targeted device.
To exploit the vulnerability, an attacker must send a sequence of malicious IP packets and TCP segments to affected devices at a high rate. The attacker may need access to trusted, internal networks, which could limit the likelihood of a successful exploit.
This alert contains CVSS scoring supplied by Cisco, the primary vendor of the affected product. Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco also indicates through that CVSS score that updates are available, however, Cisco TelePresence Recording Server is no longer under development and this issue will not be fixed for that product.
An unauthenticated, remote attacker could exploit this vulnerability to cause a targeted device to stop responding to legitimate user requests and possibly cause services and processes on the device to crash. Sustained attacks could result in a DoS condition.
The vulnerability is due to improper processing of malformed IP packets and TCP segments by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted sequence of IP packets and TCP segments at a high rate to the targeted device. When processed, the malicious sequence could cause the device to stop responding to legitimate user requests and possibly cause services and processes on the device to crash. Sustained attacks could result in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
The Cisco Security team has created the following guide to assist administrators in improving the security posture of their installations: Cisco TelePresence Hardening Guide
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at email@example.com.
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.