Cisco Bug: CSCvu53078 - Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Mar 24, 2021
- Cisco IronPort Email Security Appliance Software
Known Affected Releases
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.
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Bug Details Include
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