Cisco Secure Access Control System contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks. Updates are available.
A vulnerability in the web framework of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web interface on the affected system.
The vulnerability is due to insufficient input validation of a parameter. An attacker could exploit this vulnerability by convincing a user to access a malicious link.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco ACS versions 5.4(0.46.3) and prior were vulnerable. Later releases of Cisco ACS may also be vulnerable.
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
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-2014-0663
Customers are advised to consult Cisco bug ID CSCum03625 for a complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary script or HTML code in the user's browser session in the security context of the affected site. A successful exploit could allow the attacker to obtain sensitive browser-based information, such as authentication cookies and recently submitted data.
The vulnerability is due to insufficient validation of user-supplied input by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to click a crafted URL. Successful exploitation could allow the attacker to execute arbitrary script code in the user's browser session in the security context of the affected site.
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 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.