CVE-2024-38473 Apache HTTP Server proxy encoding problem

What is CVE-2024-38473?

CVE-2024-38473 is a high-severity authentication bypass vulnerability in Apache Http Server, published on 1 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests. Users are recommended to upgrade to version 2.4.60, which fixes this issue.

Weakness: CWE-116

Which versions are affected by CVE-2024-38473?

1 open source package ship an affected version, including apache. It affects 2 products.

Products include Apache Http Server, Netapp Ontap.

How do I fix CVE-2024-38473?

Upgrade apache to 2.4.60 or later.

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

Is CVE-2024-38473 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-38473 exists.

Public exploit code: 1 Nuclei template and 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-2024-38473, AZL-43065, AZL-43133, BELL-CVE-2024-38473, BIT-apache-2024-38473, CLEANSTART-2026-OB27244 and 4 more.