Cisco NX-OS Software running on Cisco Nexus 1000V devices contain a vulnerability that could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges. Updates are not available.
A vulnerability in the license installation module of Cisco Nexus 1000V could allow an authenticated, local attacker to execute arbitrary shell commands.
The vulnerability is due to a failure of the install license command to properly validate user-supplied input. An attacker could exploit this vulnerability by providing crafted arguments to the install license command.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco NX-OS Software version 4.2 was vulnerable when running on Cisco Nexus 1000V devices. Other versions of Cisco NX-OS Software may also be affected.
Only users who could access a device and authenticate with sufficient privileges to execute the vulnerable command could exploit this vulnerability. The access requirement greatly limits the sources of potential attacks.
Cisco has released a security notice at the following link: CVE-2013-3400
Customers should refer to Cisco bug ID CSCuh30824 for the most complete list of affected product versions.
An authenticated, local attacker could exploit this vulnerability to execute arbitrary commands on a targeted device with elevated privileges.
The vulnerability is due to improper validation of user-supplied input to the install license command.
A local attacker could exploit this vulnerability by first authenticating to a privileged security context and running the vulnerable command supplied with malicious options. The processing of the malicious option input could allow the attacker to execute arbitrary shell commands.
Administrators are advised to apply updates as they become available.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
The security vulnerability applies to the following combinations of products.
Cisco NX-OS Software
for Nexus 1000 Series 4.2(1)SV1(5.1a)
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.