Cisco Security Advisory
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AV:L/AC:L/Au:S/C:C/I:C/A:N/E:F/RL:OF/RC:C
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A vulnerability in the command-line interface (CLI) parser of Cisco NX-OS Software could allow an authenticated, local attacker to create files in any location that they have access.
The vulnerability is due to improper input filtering of file name input. An attacker could exploit this vulnerability by including a relative path in the file name parameter. A successful exploit could allow the attacker to write arbitrary scripts to any part of the file system, which an administrator could execute inadvertently.
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.
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Customers should refer to Cisco bug IDs CSCua71557 and CSCua71551 for the most complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, the following Cisco products were affected:- Cisco NX-OS Software versions 4.0(0)N1(1a) through 5.0(3)N2(2b)) when running on the Cisco Nexus 5000 Series.
- Cisco NX-OS Software versions 4.1.(2) through 6.1(2) when running on the Cisco Nexus 7000 Series.
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 apply the appropriate updates.
Administrators are advised to allow only trusted users to access local systems.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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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 e-mail at tac@cisco.com.
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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 2013-Oct-08
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