Cisco NX-OS Software contains a vulnerability that could allow a local attacker to conduct directory traversal attacks. Updates are not available.
A vulnerability in the Command Line Interface (CLI) of the Cisco NX-OS Software could allow an authenticated, local attacker to access arbitrary files on the device.
The vulnerability is due to improper filtering of user input. An attacker could exploit this vulnerability by leveraging the tar command to perform a directory traversal attack. An exploit could allow the attacker to access arbitrary files on an affected device.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
At the time this alert was first published, the following versions of Cisco products were vulnerable. Later versions of Cisco products may also be affected.
Cisco NX-OS Software version 6.1(4a) and prior
Cisco Virtual Security Gateway for Nexus 1000V Series Switches version VSG1(5.2) and prior
Cisco Nexus 1000V InterCloud for VMware version 5.2(1)IC1(1.2)
To exploit this vulnerability, an attacker must have local access to the targeted device. This access requirement decreases 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-2012-4131
A local attacker could exploit this vulnerability to gain access to arbitrary files on an affected device. A successful exploit could be use to conduct further attacks.
The vulnerability is due to improper filtering of user input by a vulnerable device running the affected software.
A local attacker could exploit this vulnerability by leveraging the tar command to perform a directory traversal attack. An exploit could allow the attacker to access arbitrary files on an affected device which could be leveraged to conduct further attacks.
Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
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.