Cisco Security Advisory
Click Icon to Copy Verbose Score
AV:N/AC:M/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C
-
A vulnerability in the WebVPN portal login page of the Cisco ASA could allow an unauthenticated, remote attacker to execute cross-site scripting (XSS) attacks or hijack user sessions.
The vulnerability is due to a failure to properly validate user-supplied input in the WebVPN portal login page. An attacker could exploit this vulnerability by convincing a user to click a crafted URL.
Cisco has confirmed this vulnerability in a security notice and software updates are available.
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.
-
Customers should refer to Cisco bug ID CSCug83080 for the most complete list of affected product versions.
-
Administrators are advised to apply the appropriate updates.
For additional information about XSS attacks and the methods used to exploit these vulnerabilities, see the Cisco Applied Mitigation Bulletin Understanding Cross-Site Scripting (XSS) Threat Vectors.
Users should verify that unsolicited links are safe to follow.
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 tac@cisco.com for assistance.
-
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.
-
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.
-
Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2013-Jul-25
-
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors. The information in this document is intended for end-users of Cisco products.