AV:N/AC:M/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C
-
Cisco ASA Software versions prior to 8.1(2) contain a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.
The vulnerability exists due to improper handling of characters within URLs. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a malicious URL. If successful, the attacker could execute arbitrary script within the user's browser in the security context of the affected site.
Proof-of-concept code is available.
Cisco has confirmed this vulnerability in software release notes and released updated software.
To exploit the vulnerability, an attacker must convince a user to view a malicious link. The attacker may provide links within e-mail messages sent to the user. If the user views the link, the attacker could execute arbitrary script code in the user's browser in the security context of the Cisco ASA web interface. An exploit could allow the attacker to gain access to sensitive information such as user credentials or recently submitted data.
Cisco would like to thank Daniel King from SecureWorks for discovering this vulnerability.
-
Cisco issued software release notes to address Cisco BugID CSCsr09163 at the following link: Cisco ASA Release Notes Version 8.1(2)
-
Administrators are advised to apply the available software updates.
Users should verify that unsolicited links are safe to follow.
Administrators are advised to monitor critical 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 e-mail at tac@cisco.com.
-
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.
-
Version Description Section Status Date 1.0 Initial Release NA Final 2010-Jun-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.