Vulnerability Alert

Cisco Unified Computing System Serial over LAN Static Private Key Vulnerability

 
Threat Type:CWE: Design Error
IntelliShield ID:30858
Version:1
First Published:2013 September 18 14:00 GMT
Last Published:2013 September 18 14:00 GMT
Port: Not available
CVE:CVE-2012-4074
BugTraq ID:62455
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.6
 
Version Summary:Cisco Unified Computing System Software contains a vulnerability that could allow an unauthenticated, remote attacker to conduct man-in-the-middle attacks. Updates are available.
 
 
Description
A vulnerability in the Cisco Unified Computing System Serial over LAN (SoL) implementation could allow an unauthenticated, remote attacker to perform a man-in-the-middle (MITM) attack.

The vulnerability occurs because the Board Management Controller (BMC) uses a hard-coded private key. An attacker could exploit this vulnerability by intercepting an SoL connection. A successful exploit could allow the attacker to view or modify SoL communications.

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 1.3 and prior were vulnerable. Later releases of Cisco Unified Computing System Software may also be vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks in which the targeted device may reside to intercept SoL communications. This access requirement limits 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-2012-4074

Customers are advised to consult Cisco bug ID CSCte90338 for a complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to conduct a MITM attack that could be used to conduct further attacks.
 
Technical Information
The vulnerability is due to a design error in the affected software that exists because the BMC uses a hard-coded private key.

An unauthenticated, remote attacker could exploit this vulnerability by intercepting SoL communications established by the targeted device. Successful exploitation could allow the attacker to perform an MITM attack to view or modify SoL communications.
 
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

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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