A vulnerability in the URL filtering mechanism 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. This vulnerability is due to improper processing 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 an affected device, which could allow malicious URLs to pass through the device.
The product receives data from an upstream component, but does not completely filter one or more instances of special elements before sending it to a downstream component.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Asyncos | Cisco | - (including) | - (including) |
Incomplete filtering of this nature involves either: