SUBJECT: CVE-2022-31813 IP based authentication bypass
TECH STACK: Apache HTTP Server versions 2.4.0 through 2.4.55
DATE(S) ISSUED: 06/09/2022
NVD Last Modified: 08/19/2022
CRITICALITY: CRITICAL
OVERVIEW:
Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded-* headers to the origin server based on client side Connection header hop-by-hop mechanism. This may be used to bypass IP based authentication on the origin server/application.
SOLUTION:
Mitigation instructions for CVE-2022-31813 (Apache HTTP Server mod_proxy X-Forwarded-For):
Update Apache HTTP Server: Ensure that you are using the latest version of Apache HTTP Server. Check the Apache website or your distribution's security advisories for updates.
Disable mod_proxy: If you are not using the mod_proxy module, disable it in the Apache HTTP Server configuration to mitigate the vulnerability.
Implement Access Control: Configure access control rules to restrict access to sensitive resources and prevent unauthorized requests from reaching the backend servers.
Implement Web Application Firewall (WAF): Deploy a WAF to provide an additional layer of protection against potential attacks targeting the mod_proxy module.
Regularly monitor and review logs: Monitor the server logs for any suspicious activity, including unexpected HTTP headers or anomalies in the X-Forwarded-For header.
Follow security best practices: Implement secure coding practices, use secure configurations, and regularly update and patch all software components in your infrastructure.
Stay informed: Keep track of security advisories and updates from the Apache HTTP Server project and other relevant sources to stay informed about any new developments or patches related to CVE-2022-31813.
Note: It is important to thoroughly test any configuration changes or updates in a controlled environment before applying them to a production system.
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