Cisco Email Security Appliance Filter Bypass Vulnerability

A vulnerability in URL filtering for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass URL filtering on an affected device.

The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted, malicious HTTP request to an affected device. A successful exploit could allow the attacker to redirect users to malicious sites.

Cisco has released software updates that address this vulnerability. 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-ESA-filt-39jXvMfM [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ESA-filt-39jXvMfM”]