Cisco Adaptive Security Appliance WebVPN Cross-Site Scripting Vulnerability

A vulnerability in the web-based management interface of Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device.

The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive browser-based information.

Additional information about XSS attacks and potential mitigations can be found at:

https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss [“https://sec.cloudapps.cisco.com/security/center/content/CiscoAppliedMitigationBulletin/cisco-amb-20060922-understanding-xss”]
https://www.owasp.org/index.php/Cross-site_Scripting_(XSS) [“https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)”]
There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-asa1 [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-asa1”]