CVE-2022-31813 mod_proxy X-Forwarded-For dropped by hop-by-hop mechanism

What is CVE-2022-31813?

CVE-2022-31813 is a critical authentication bypass vulnerability in Apache Http Server, published on 8 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-345, CWE-348

Which versions are affected by CVE-2022-31813?

1 open source package ship an affected version, including apache. It affects 3 products.

Products include Apache Http Server, Fedoraproject Fedora, Netapp Clustered Data Ontap.

How do I fix CVE-2022-31813?

Upgrade apache to 2.4.54 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2022-31813 being exploited?

There is no known exploitation of CVE-2022-31813 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Other vulnerabilities in Apache Http Server

• CVE-2021-42013 Apache HTTP Server Path Traversal Exploited Critical 9.8
• CVE-2024-38475 Apache HTTP Server Improper Escaping of Output Exploited Critical 9.1
• CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) Exploited Critical 9.0
• CVE-2019-0211 Apache HTTP Server Privilege Escalation Exploited High 7.8
• CVE-2021-41773 Apache HTTP Server Path Traversal Exploited High 7.5

All Apache Http Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-31813, BIT-apache-2022-31813, CLEANSTART-2026-LT25186, CLSA-2022-1656958687, CLSA-2022-1656958887, DEBIAN-CVE-2022-31813 and 1 more.