Vulnerability Alert

Cisco Adaptive Security Appliance Auto-Update Denial of Service Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:31693
Version:1
First Published:2013 November 11 19:36 GMT
Last Published:2013 November 11 19:36 GMT
Port: Not available
CVE:CVE-2013-5568
BugTraq ID:63628
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.4 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.1
 
Version Summary:Cisco Adaptive Security Appliance Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available.
 
 
Description
A vulnerability in the auto-update feature of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause a reload of the ASA.

The vulnerability is due to insufficient input validation of auto-update data. An attacker could exploit this vulnerability by submitting crafted data to the auto-update process. An exploit could allow the attacker to cause the ASA to reload.

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, Cisco ASA Software Release 9.0.3.6 and prior were vulnerable. Later releases of Cisco ASA Software may also be vulnerable.
 
IntelliShield Analysis
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
 
Vendor Announcements
Cisco released a security notice at the following link: CVE-2013-5568

Customers are advised to consult Cisco bug ID CSCui33308 for the most complete list of affected product versions.
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected device to reload, resulting in a denial of service (DoS) condition.
 
Technical Information
The vulnerability is due to insufficient input validation of auto-update data by the auto-update feature used by an affected device.

An unauthenticated, remote attacker could exploit this vulnerability by submitting crafted data to the auto-update process. An exploit could allow the attacker to cause the ASA to reload, resulting in a DoS condition.
 
Safeguards
Administrators are advised to contact the vendor regarding future updates and releases.

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
Software updates are not available.
 
Alert History
 
Initial Release


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

Primary Products:
CiscoCisco Adaptive Security Appliance (ASA) Software 9.0 .1, .2, .2.10, .3, .3.6

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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