Cisco Security Advisory
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AV:N/AC:L/Au:S/C:N/I:N/A:C/E:F/RL:OF/RC:C
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A vulnerability in the t-shell implementation of Cisco TelePresence System Software could allow an authenticated, remote attacker to exhaust the available memory and create a denial of service (DoS) condition.
The vulnerability is due to improper handling of orphaned t-shell sessions. An attacker could exploit this vulnerability by opening several Secure Shell (SSH) sessions with the affected system. An exploit could allow the attacker to consume available memory; therefore, the affected system may become unreachable and unable to function properly. A hard reboot is needed to restore complete functionality.
Cisco has confirmed the vulnerability in a Security Notice and software updates are available.
To exploit this vulnerability, the attacker must authenticate to a targeted system. This access requirement 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.
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Cisco has released a Security Notice for bug ID CSCug77610 at the following link: CVE-2013-1246
Vulnerable Products
At the time this alert was first published, Cisco TelePresence System Software 1.10(0)(259) and prior were vulnerable. Later versions of Cisco TelePresence System Software may also be affected.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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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.
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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 tac@cisco.com for assistance.
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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.
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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 LessVersion Description Section Status Date 1.0 Initial Release NA Final 2013-May-29
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