Cisco Unified Computing System Software contains a vulnerability that could allow an unauthenticated, remote attacker to gain access to sensitive information. Updates are available.
A vulnerability in the high availability service of Cisco
Unified Computing System Fabric Interconnect could allow an
unauthenticated, remote attacker to gain access to sensitive information
and prevent the cluster service from syncing with its peers.
vulnerability is due to improper binding of the cluster service to the
management interface. An attacker could exploit this vulnerability by
establishing a Telnet connection to the cluster service from a remote
location. A successful exploit could allow the attacker to gain access
to sensitive information and modify a field that results in the
cluster service unable to sync with its peers.
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 2.1 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 establish a Telnet connection to the cluster service from a remote location. It is likely that this cluster service would reside on a device in an internal trusted network to which an attacker would need access. In addition, the attacker would need to know the name or IP address associated with the targeted device in an attempt to establish a connection.
It is recommended to use SSH instead of Telnet, as SSH is the more secured method of establishing remote connections.
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-2012-4136
Customers are advised to consult Cisco bug ID CSCtz72910 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to gain access to sensitive information. The attacker could leverage the information to modify a field that could prevent the cluster service to sync with its peers.
The vulnerability is due to improper binding of the cluster service to the management interface of an affected device.
An unauthenticated, remote attacker could exploit this vulnerability by establishing a Telnet connection to the cluster service from a remote location. A successful exploit could allow the attacker to gain access to sensitive information and modify a field that results in the cluster service unable to sync with its peers.
Administrators are advised to apply the appropriate updates.
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.
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 email@example.com for assistance.
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.