Cisco Security Advisory
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AV:N/AC:H/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C
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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.
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.
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Cisco has released a security notice for bug ID CSCue88386 at the following link: CVE-2013-1203
Vulnerable Products
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.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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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.
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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
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2013-Jun-17
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