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.
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.
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.
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.
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 affected systems.
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 email@example.com
The security vulnerability applies to the following combinations of products.
Cisco ASA CX Context-Aware Security Software
9.0 Base, .1, .1-40, .2, .2-68
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.