A local privilege escalation vulnerability in the command-line interpreter of Cisco Nexus devices could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system with user privileges.
The vulnerability exists due to insufficient input sanitization of parameters passed to the tar command on the command-line interpreter of an affected device. An attacker could leverage this behavior to execute arbitrary commands on the underlying operating system with the privileges of the user authenticated to the device.
Cisco has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker must have local access and be able to authenticate to the targeted device. These requirements could limit the possibility of a successful exploit.
Cisco would like to thank Jens Krabbenhoeft for discovering and reporting this vulnerability.
Cisco has released bug ID CSCus44856 for registered users, which contains additional details and an up-to-date list of affected product versions.
Vulnerable ProductsAt the time this alert was first published, Cisco Nexus and MDS 9000 devices running Cisco NX-OS Software release 6.2(10) were vulnerable. Later releases of Cisco NX-OS Software may also be vulnerable.
Products Confirmed Not VulnerableNo other Cisco products are currently known to be affected by these vulnerabilities.
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 privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at email@example.com.
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Version Description Section Status Date 1.0 Initial Release NA Final 2015-Jun-30
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