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Vulnerability Alert

Cisco NX-OS Directory Traversal Vulnerability

 
Threat Type:CWE-22: Path Traversal
IntelliShield ID:32237
Version:1
First Published:2013 December 19 21:23 GMT
Last Published:2013 December 19 21:23 GMT
Port: Not available
CVE:CVE-2012-4135
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.6 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.4
Related Resources:
View related Security Notice
 
 
Version Summary:Cisco NX-OS Software contains a vulnerability that could allow a local attacker to conduct directory traversal attacks. Updates are not available.
 
 
Description
A vulnerability in the Command Line Interface (CLI) of the Cisco NX-OS Software could allow an authenticated, local attacker to delete arbitrary files on the device.

The vulnerability is due to improper filtering of user input. An attacker could exploit this vulnerability by leveraging the filesys delete command to perform a directory traversal attack. An exploit could allow the attacker to delete arbitrary files on an affected device.

Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
 
Warning Indicators
At the time this alert was first published, the following versions of Cisco products were vulnerable. Later versions of Cisco products may also be affected.
  • Cisco NX-OS Software version 6.1(2) and prior
  • Cisco Virtual Security Gateway for Nexus 1000V Series Switches version VSG1(5.2) and prior
  • Cisco Nexus 1000V InterCloud for VMware version 5.2(1)IC1(1.1)
 
IntelliShield Analysis
To exploit this vulnerability, an attacker must have local access to the targeted device. This access requirement decreases 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.
 
Vendor Announcements
Cisco has released a security notice at the following link: CVE-2012-4135

Customers are advised to consult Cisco bug IDs CSCty07270, CSCty07271, CSCty07273, and CSCty07275 for the most complete list of affected product versions.
 
Impact
A local attacker could exploit this vulnerability to delete arbitrary files on an affected device.
 
Technical Information
The vulnerability is due to improper filtering of user input by a vulnerable device running the affected software.

A local attacker could exploit this vulnerability by leveraging the filesys delete command to perform a directory traversal attack. An exploit could allow the attacker to delete arbitrary files on an affected device.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

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.
 
Patches/Software
Software updates are not available.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoCisco NX-OS Software Cisco Nexus 1000V Switch for Microsoft Hyper-V 5.2(1)SM1(5.1) | for Nexus 3000 Series Base, 5.0(3)U1(1), 5.0(3)U1(1a), 5.0(3)U1(1b), 5.0(3)U1(1d), 5.0(3)U1(2), 5.0(3)U1(2a), 5.0(3)U2(1), 5.0(3)U2(2), 5.0(3)U2(2a), 5.0(3)U2(2b), 5.0(3)U2(2c), 5.0(3)U2(2d), 5.0(3)U3(1), 5.0(3)U3(2), 5.0(3)U3(2a), 5.0(3)U3(2b), 5.0(3)U4(1), 5.0(3)U5(1) | for Nexus 5000 Series Base, 4.0(0)N1(1a), 4.0(0)N1(2), 4.0(0)N1(2a), 4.0(1a)N1(1), 4.0(1a)N1(1a), 4.0(1a)N2(1), 4.0(1a)N2(1a), 4.1(3)N1(1), 4.1(3)N1(1a), 4.1(3)N2(1), 4.1(3)N2(1a), 4.2(1)N1(1), 4.2(1)N2(1), 4.2(1)N2(1a), 5.0(2)N1(1), 5.0(3)N1(1c), 5.0(2)N2(1), 5.0(2)N2(1a), 5.0(3)N2(1), 5.0(3)N2(2), 5.0(3)N2(2a), 5.0(3)N2(2b), 5.1(3)N1(1), 5.1(3)N1(1a), 5.1(3)N2(1), 5.1(3)N2(1a), 5.1(3)N2(1b), 5.1(3)N2(1c), 5.2(1)N1(1), 5.2(1)N1(1a), 5.2(1)N1(1b), 5.2(1)N1(2), 5.2(1)N1(2a), 5.2(1)N1(3), 5.2(1)N1(4), 5.2(1)N1(5), 5.2(1)N1(6) | for Nexus 7000 Series Base, 4.1.(2), 4.1.(3), 4.1.(4), 4.1.(5), 4.2.(2a), 4.2(3), 4.2(4), 4.2(6), 4.2(8), 5.0(2a), 5.0(3), 5.0(5), 5.1(1), 5.1(1a), 5.1(3), 5.1(4), 5.1(5), 5.1(6), 5.2(1), 5.2(3a), 5.2(4), 5.2(5), 5.2(7), 5.2(9), 6.0(1), 6.0(2), 6.0(3), 6.0(4), 6.1(1), 6.1(2)
CiscoCisco Virtual Security Gateway for Nexus 1000V Series Switches 4.2(1) VSG1(1), VSG1(2), VSG1(3.1), VSG1(5.1), VSG1(5.1a), VSG1(5.2)
CiscoCisco Nexus 1000V InterCloud for VMware 5.2(1)IC1 (1.1)

Associated Products:
N/A




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LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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