A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked. This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.

According to its self-reported version, Cisco Secure Web Appliance Content Encoding Filter Bypass is affected by a filter bypass vulnerability. An unauthenticated, remote attacker can exploit this, by sending malformed encoded traffic, to bypass an explicit block rule and receive traffic that should have been rejected by the device.

Please see the included Cisco BID and Cisco Security Advisory for more information.

Detections

Analytics

CVE-2022-20952

medium

Tenable Plugins

medium