Cisco Unified Computing System contains a vulnerability that could allow an authenticated, local attacker to overwrite arbitrary files on the filesystem. Updates are available.
A vulnerability in the image download process of the Cisco Unified Computing
System fabric interconnect could allow an authenticated, local attacker
to overwrite arbitrary files on the filesystem.
vulnerability occurs because the storage location is defined in the image
header. An attacker could exploit this vulnerability by modifying the
image header to specify a different directory and filename. A
successful exploit could allow the attacker to delete arbitrary files.
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 would need to authenticate and have local access to the targeted device, which may reside on trusted, internal networks. These access requirements limit 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-2012-4104
Customers are advised to consult Cisco bug ID CSCtq02706 for a complete list of affected product versions.
An authenticated, local attacker could exploit this vulnerability to overwrite or delete arbitrary files on an affected device. Successful exploitation could result in a complete system compromise.
Technical information is not available.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
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 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.