Cisco Unified Computing System contains a vulnerability that could allow an authenticated, remote attacker to gain elevated privileges. Updates are available.
vulnerability in the Baseboard Management Controller (BMC) of Cisco Unified
Computing System could allow an authenticated, remote attacker to access
services with elevated privileges.
The vulnerability is due to
improper filtering of SSH escape sequences. An attacker could exploit
this vulnerability by using SSH port forwarding to bypass additional authentication. A successful exploit
could allow the attacker to access certain services with elevated
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco Unified Computing System versions 1.1(1m) and prior were vulnerable. Later releases of Cisco Unified Computing System may also be vulnerable.
To exploit this vulnerability, an attacker must be able to authenticate to the targeted device. This access requirement limits 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-2012-4078
Customers are advised to consult Cisco bug ID CSCtg17656 for a complete list of affected product versions.
An authenticated, remote attacker could exploit this vulnerability to access certain services on an affected device with elevated privileges. Successful exploitation could be used to conduct further attacks.
The vulnerability is due to improper filtering of SSH escape sequences by the BMC of an affected device.
An authenticated, remote attacker could exploit this vulnerability by using SSH port forwarding to bypass additional authentication. A successful exploit could allow the attacker to access certain services with elevated privileges, which could be used to conduct further attacks.
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 email at firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Cisco Unified Computing System (Managed)
1.0 Base, (2k) | 1.1 Base, (1m)
Cisco Unified Computing System (Standalone)
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.