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 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 |
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