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Vulnerability Alert

Cisco ASA-CX TCP Traffic Denial of Service Vulnerability

 
Threat Type:CWE: Insufficient Information
IntelliShield ID:29683
Version:1
First Published:2013 June 17 20:16 GMT
Last Published:2013 June 17 20:16 GMT
Port: Not available
CVE:CVE-2013-1203
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.4 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:4.0
 
 
Version Summary:Cisco ASA-CX contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted device. Updates are available.
 
 
Description
A vulnerability processing TCP traffic on Cisco ASA CX could allow an unauthenticated, remote attacker to cause a reload of the affected device.

The vulnerability is due to invalid parsing of TCP packet data forwarded to Cisco ASA CX by the Cisco ASA. An attacker could exploit this vulnerability by sending specific TCP traffic to the Cisco ASA CX to be processed.

Cisco has confirmed the vulnerability in a security notice and has released software updates.
 
Warning Indicators
At the time this alert was first published, Cisco ASA CX Context-Aware Security Software versions 9.0.1, 9.0.1-40, 9.0.2, and 9.0.2-68 were affected. Later releases of Cisco ASA CX Context-Aware Security Software may also be affected.
 
IntelliShield Analysis
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send crafted requests to the affected software. This access requirement could limit the likelihood of a successful exploit.
 
Vendor Announcements
Cisco has released a security notice for bug ID CSCue88386 at the following link: CVE-2013-1203
 
Impact
An unauthenticated, remote attacker could exploit the vulnerability to cause a reload of the affected device, resulting in a denial of service (DoS) condition for legitimate users.
 
Technical Information
Additional technical details are not available.
 
Safeguards
Administrators are advised to apply the appropriate updates.

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

It is critical to prevent unauthorized direct communication to network devices. Restrict network traffic destined for the network infrastructure to protect against reconnaissance and DoS attacks. For configuration details, see Protecting Your Core: Infrastructure Protection Access Control Lists.

Understanding activity on the network provides information and visibility that can identify potential security incidents. Organizations should log events from devices and review the logged data to provide insight into anomalies or malicious activity. For logging best practices, see Cisco Guide to Harden Cisco IOS Devices.

Administrators are advised to monitor network traffic for security-related network activity. Cisco NetFlow identifies security-related network activity. For more information about Cisco NetFlow, see Introduction to Cisco IOS NetFlow - A Technical Overview.

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 ASA CX Context-Aware Security Software 9.0 Base, .1, .1-40, .2, .2-68

Associated Products:
N/A




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


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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