Vulnerability Alert

Cisco Adaptive Security Appliance Software Digital Certificate HTTP Authentication Bypass Vulnerability

 
Threat Type:CWE-264: Permissions, Privileges, and Access Control
IntelliShield ID:31103
Version:1
First Published:2013 October 09 16:20 GMT
Last Published:2013 October 09 16:20 GMT
Port: Not available
CVE:CVE-2013-5511
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:8.3
 
Version Summary:Cisco Adaptive Security Appliance Software contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions and gain unauthorized access to a device. Updates are available.
 
 
Description
A vulnerability in the authentication code of remote management via Cisco Adaptive Security Device Management (ASDM) could allow an unauthenticated, remote attacker to bypass the digital certificate authentication. Depending on the configuration, this may allow the attacker to remotely connect as administrator to the management interface via Cisco ASDM and take full control of the affected system.

The vulnerability is due to an error in the implementation of the authentication-certificate option, which enables client-side digital certificate authentication. An attacker could exploit this vulnerability by trying to authenticate to an interface of the affected system where Cisco ASDM is enabled.

Cisco has confirmed the vulnerability in a security advisory and released software updates.
 
Warning Indicators
Cisco Adaptive Security Appliance Software versions prior to 8.2(5.46), 8.3(2.39), 8.4(6.6), 8.5(1.18), 8.6(1.12), 8.7(1.7), 9.0(3.1), and 9.1(2.6) are vulnerable.
 
IntelliShield Analysis
Only devices with interfaces that have enabled Cisco Adaptive Security Device Management (ASDM) are vulnerable, limiting the potential for exploitation.
 
Vendor Announcements
Cisco has released a security advisory for Cisco bug ID CSCuh44815 at the following link: cisco-sa-20131009-asa
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to gain unauthorized access to a targeted device.
 
Technical Information
The vulnerability is due to improper processing of authentication using digital certificates.

An unauthenticated, remote attacker could exploit the vulnerability by attempting to authenticate to a vulnerable device. Improper handling of the authentication request could allow the attacker to bypass authentication checks and gain unauthorized access to the device.
 
Safeguards
Administrators are advised to apply the appropriate updates.

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 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 email at tac@cisco.com.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco Adaptive Security Appliance (ASA) Software 8.2 .0.45, .1, .1.11, .2, .2.9, .2.10, .2.12, .2.16, .2.17, .3, .4, .4.1, .4.4, .5, .5.13, .5.22, .5.26, .5.33, .5.40, .5.41 | 8.3 .1, .1.1, .1.4, .1.6, .2, .2.4, .2.13, .2.23, .2.25, .2.31, .2.33, .2.34, .2.37 | 8.4 .1, .1.3, .1.11, .2, .2.1, .2.8, .3, .3.8, .3.9, .4, .4.1, .4.3, .4.5, .4.9, .5, .5.6, .6 | 8.5 .1, .1.1, .1.6, .1.7, .1.14, .1.17 | 8.6 .1, .1.1, .1.2, .1.5, .1.10 | 8.7 .1, .1.1, .1.3, .1.4 | 9.0 .1, .2, .2.10, .3 | 9.1 .1, .1.4, .2

Associated Products:
N/A




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