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Vulnerability Alert

Cisco Unified Computing System KVM Authentication Bypass Vulnerability

 
Threat Type:CWE-287: Authentication Issues
IntelliShield ID:29032
Version:1
First Published:2013 April 24 16:27 GMT
Last Published:2013 April 24 16:27 GMT
Port: Not available
CVE:CVE-2013-1186
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.5 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.2
 
Version Summary:Cisco Unified Computing System Software contains a vulnerability that could allow an unauthenticated, remote attacker to gain unauthorized access. Updates are available.
 
 
Description
Cisco UCS platforms contain an IP keyboard, video, mouse (KVM) authentication bypass vulnerability. An unauthenticated, remote attacker who can send a malicious KVM authentication request to the Cisco IMC of a managed computing resource could bypass authentication and access to the IP KVM console of the physical or virtual device. This vulnerability could also allow an unauthenticated, remote attacker to join an existing, active IP KVM session if the active owner confirms the request or fails to respond to the request within 60 seconds.

Cisco has confirmed the vulnerability in a security advisory and has released software updates.
 
Warning Indicators
The following versions of managed Cisco Unified Computing System are vulnerable:
  • Versions 2.0(1x) and prior
  • All 1.0(x) versions
  • All 1.1(x) versions
  • All 1.2(x) versions
  • All 1.3(x) versions
  • All 1.4(x) versions

The following versions of standalone Cisco Unified Computing System are vulnerable:
  • Version 1.4(3s) and prior
  • All 1.0(x) versions
  • All 1.1(x) versions
  • All 1.2(x) versions
  • All 1.3(x) versions
 
IntelliShield Analysis
It is likely that an attacker would need access to an internal, private network to send malicious KVM authentication requests to a targeted device. This access requirement decreases the likelihood of a successful exploit.

Successful exploitation could allow an attacker to join an existing, active IP KVM session if the active owner confirms the request or fails to respond to the request within 60 seconds.

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 advisory for Cisco bug ID CSCts53746 at the following link: cisco-sa-20130424-ucsmulti
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to bypass authentication and gain unauthorized access to the IP KVM console of a targeted physical or virtual device.
 
Technical Information
The vulnerability is due insufficient security restrictions by the IP KVM component used by an affected device.

An unauthenticated, remote attacker could exploit this vulnerability by sending a malicious KVM authentication request to a targeted device. If successful, the attacker could bypass authentication and gain unauthorized access to the device, which could be used 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.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: Identifying and Mitigating Multiple Vulnerabilities in Cisco Unified Computing System

Administrators are advised to monitor affected systems.
 
Patches/Software
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.
 
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, (1m), (1q), (1s), (1t), (1w), (1x)
CiscoCisco Unified Computing System (Standalone) 1.1 Base, (1d) | 1.2 Base, (1b), (2d), (2j), (2l) | 1.3 Base, (1c), (1d), (2d), (2i), (2j) | 1.4 Base, (1c), (2), (3c)2, (3c)1, (3j), (3k), (3p), (3p)5, (3s)

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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