A vulnerability in the TACACS+ command authorization feature of Cisco NX-OS Software could allow an authenticated, local attacker to cause the system to reset. The vulnerability is due to incorrect processing of very long command-line interface (CLI) commands by the TACACS+ command authorization feature. An attacker could exploit this vulnerability by being locally authenticated and executing a long CLI command that is subject to command authorization. An exploit could allow the attacker to cause the device to reload. Cisco has confirmed the vulnerability in a security notice and released software updates. To exploit this vulnerability, an attacker must authenticate and have local access to a targeted system. These requirements would likely reduce the possibility 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.
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-Feb-02 |
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