Cisco Security Advisory
Cisco TelePresence Supervisor MSE 8050 Denial of Service Vulnerability
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AV:N/AC:L/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
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Cisco TelePresence Supervisor MSE 8050 contains a vulnerability that may allow an unauthenticated, remote attacker to cause high CPU utilization and a reload of the affected system.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130515-mse
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The Cisco TelePresence MSE 8000 Series is a chassis-based platform for high-definition video conferencing and voice communication. The Cisco TelePresence Supervisor MSE 8050 is the core of the Cisco TelePresence MSE 8000 Series and provides management service for the chassis and other Cisco TelePresence products that are supported as part of the Cisco TelePresence MSE 8000 Series.
A vulnerability in the network stack of the Cisco TelePresence MSE 8050 Supervisor could allow an unauthenticated, remote attacker to cause high CPU utilization and a reload of the affected system.
The vulnerability is due to improper handling and processing of TCP connection requests sent at a high rate. An attacker could exploit this vulnerability by sending a sequence of TCP segments at a high rate to the management IP address of the affected system. A full TCP three-way handshake is required to exploit this vulnerability. An exploit could allow the attacker to cause high CPU utilization, which may trigger a reload of the affected system and cause a denial of service condition.
This vulnerability is documented in Cisco bug IDs CSCuf76076 (registered customers only) and CSCuf79763 (registered customers only) and has been assigned Common Vulnerabilities and Exposure (CVE) ID CVE-2013-1236
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Workarounds that mitigate this vulnerability are not available.
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This vulnerability has been resolved in Cisco TelePresence Supervisor MSE 8050 software versions 2.3(1.31) and above.
When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
This vulnerability was found during internal tests.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessRevision 1.0 2013-May-15 Initial public release.
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