Cisco NX-OS Software Input Validation Vulnerability

A vulnerability in the command-line interface (CLI) parser of Cisco NX-OS Software could allow an authenticated, local attacker to create or overwrite files.

The vulnerability is due to improper input filtering. An attacker could exploit this vulnerability by using a shell output redirection. A successful exploit could allow the attacker to create or overwrite arbitrary files. This vulnerability is available to all users, including read-only users.

Cisco has confirmed the vulnerability in a security notice and has released software updates.

To exploit this vulnerability, an attacker requires authenticated access to the targeted system. Authenticated access may require the attacker to access trusted, internal networks. These access requirements could 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.