Cisco Guard Enables Cross Site Scripting

A vulnerability in the Cisco Guard may enable an attacker to send a web browser client to a malicious website with the use of Cross Site Scripting (XSS) when the Guard is providing anti-spoofing services between the web browser client and a webserver. The attacker may exploit this by providing a malicious URL for the web browser client to go to, often in email, followed off of a malicious website, or in an instant message. This issue may occur even if the protected website does not allow XSS. A software upgrade is required to fix this vulnerability. There is a workaround available to mitigate the effects of the vulnerability.

This advisory is available at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20060920-guardxss [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20060920-guardxss”].