CVE-2022-20784

Cisco Web Security Appliance Filter Bypass Vulnerability

Description

A vulnerability in the Web-Based Reputation Score (WBRS) engine of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass established web request policies and access blocked content on an affected device. This vulnerability is due to incorrect handling of certain character combinations inserted into a URL. An attacker could exploit this vulnerability by sending crafted URLs to be processed by an affected device. A successful exploit could allow the attacker to bypass the web proxy and access web content that has been blocked by policy.

Category

5.8
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.61%
Vendor Advisory cisco.com
Affected: Cisco Cisco Web Security Appliance (WSA)
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-swa-filter-bypass-XXXTU3X vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-20784?
CVE-2022-20784 has been scored as a medium severity vulnerability.
How to fix CVE-2022-20784?
To fix CVE-2022-20784, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-20784 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-20784 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-20784?
CVE-2022-20784 affects Cisco Cisco Web Security Appliance (WSA).
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