Cisco IPS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are available.
A vulnerability in the web framework of Cisco IPS Software could allow an unauthenticated, remote attacker to cause MainApp to hang intermittently due to the authentication manager process creating a denial of service (DoS) condition.
The vulnerability is due to improper handling of user tokens. An attacker could exploit this vulnerability by sending a crafted connection request to the Cisco IPS management interface.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco IPS Software versions 7.1 and prior were vulnerable. Later releases of Cisco IPS Software may also be vulnerable.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks, in which the targeted device may reside, to send a crafted connection request. This access requirement limits the likelihood of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Cisco has released a security notice at the following link: CVE-2013-5497
Customers are advised to consult Cisco bug ID CSCuf20148 for the most complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to cause the MainApp on an affected device to hang, resulting in a DoS condition.
The vulnerability is due to improper handling of user tokens by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted connection request to the management interface of a targeted device. Processing the crafted request could cause the MainApp on the device to hang, creating a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at firstname.lastname@example.org for assistance.
The security vulnerability applies to the following combinations of products.
Intrusion Prevention System (IPS)
7.0 Base | 7.1 Base
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.