Cisco Security Advisory
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AV:L/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:W/RC:C
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A vulnerability in the TACACS+ command authorization code of Cisco NX-OS Software could allow an authenticated, local attacker to execute certain commands without TACACS+ server authorization.
The vulnerability is due to the processing of certain commands when executed in a sequence. An attacker could exploit this vulnerability by executing multiple commands in a sequence. A successful exploit could allow the attacker to execute certain commands without TACACS+ server authorization.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker must have local access to an affected device. This access requirement reduces the possibility of a successful exploit.
Cisco indicates through the CVSS score that proof-of-concept exploit code exists; however, the code is not known to be publicly available.
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Customers are advised to consult Cisco bug ID CSCum47367 for the most complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco NX-OS Software Release 6.2(2a) and prior were vulnerable. Later releases of Cisco NX-OS Software may also be vulnerable.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators may consider removing access to all show commands or removing access to config mode with roles on affected devices.
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.
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Software updates are not available.
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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.
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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.
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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2014-Jan-23
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