Guest

Preview Tool

Cisco Bug: CSCvu50941 - Cisco Email Security Appliance URL Filtering Bypass Vulnerability

Last Modified

Oct 14, 2020

Products (1)

  • Cisco IronPort Email Security Appliance Software

Known Affected Releases

13.5.1-270

Description (partial)

Symptom:
A vulnerability in the antispam protection mechanisms of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device.

The vulnerability is due to insufficient input validation of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for the affected device, which could allow malicious URLs to pass through the device.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-url-bypass-zZtugtg3

Conditions:
At the time of publication, this vulnerability affected Cisco AsyncOS Software for Cisco ESA releases 13.5.2 and earlier.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.