Cisco ESA URL Filter Bypass via Improper URL Handling
CVE-2023-20057 Published on January 20, 2023
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.
Vulnerability Analysis
CVE-2023-20057 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Incomplete Filtering of One or More Instances of Special Elements
The software 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.
Products Associated with CVE-2023-20057
Want to know whenever a new CVE is published for Cisco Asyncos? stack.watch will email you.
Affected Versions
Cisco Email Security Appliance (ESA) Version 10.0.1-087 is unaffected by CVE-2023-20057Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.