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Vulnerability Alert

Cisco Unified Computing System Software KVM Client Certificate Validation Vulnerability

 
Threat Type:CWE-200: Information Leak / Disclosure
IntelliShield ID:30856
Version:1
First Published:2013 September 18 16:16 GMT
Last Published:2013 September 18 16:16 GMT
Port: Not available
CVE:CVE-2012-4073
BugTraq ID:62451
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.6
Related Resources:
View related Security Notice
 
 
Version Summary:Cisco Unified Computing System Software contains a vulnerability that could allow an unauthenticated, remote attacker to conduct a man-in-the-middle attack. Updates are available.
 
 
Description
A vulnerability in Cisco Unified Computing System software KVM client could allow an unauthenticated, remote attacker to perform a man-in-the-middle attack.

The vulnerability is due to improper certificate validation by the KVM client. An attacker could exploit this vulnerability by intercepting a KVM connection. A successful exploit could allow the attacker to view or modify KVM data.

Cisco has confirmed the vulnerability in a security notice and released software updates.
 
Warning Indicators
At the time this alert was first published, Cisco Unified Computing System Software versions 2.0 and prior were vulnerable. Later releases of Cisco Unified Computing System Software may also be vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, an attacker must be in a position to present a crafted certificate to the targeted device, which may reside on trusted, internal networks. As a result, the location of the targeted device may reduce 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-2012-4073

Customers are advised to consult Cisco bug ID CSCte90332 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to intercept a KVM connection, which could allow the attacker to view or modify KVM data. Successful exploitation could be leveraged to conduct further attacks.
 
Technical Information
The vulnerability is due to improper certification validation by the KVM client used by the affected software.

An unauthenticated, remote attacker could exploit this vulnerability by presenting a crafted certificate to the targeted device and performing a man-in-the-middle attack. If successful, the attacker could have the ability to view or modify KVM data, which could be leveraged to conduct further attacks.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

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.
 
Patches/Software
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco Unified Computing System (Managed) 1.0 Base, (2k) | 1.1 Base, (1m) | 1.2 Base, (1d) | 1.3 Base, (1c), (1m), (1n), (1o), (1p), (1q), (1t), (1w), (1y) | 1.4 Base, (1i), (1j), (1m), (3i), (3l), (3m), (3q), (3s), (3u), (3y), (4f), (4g), (4i), (4j), (4k) | 2.0 Base

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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