CVE-2022-37436 Apache HTTP Server: mod_proxy prior to 2.4.55 allows a backend to trigger HTTP response splitting
A malicious backend can truncate response headers, causing security headers to be ignored by clients, potentially bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-37436?
CVE-2022-37436 is a medium-severity vulnerability in Apache Http Server, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Prior to Apache HTTP Server 2.4.55, a malicious backend can cause the response headers to be truncated early, resulting in some headers being incorporated into the response body. If the later headers have any security purpose, they will not be interpreted by the client.
Which versions are affected by CVE-2022-37436?
1 open source package ship an affected version, including apache. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | All versions | 2.4.55 |
Products include Apache Http Server.
How do I fix CVE-2022-37436?
Upgrade apache to 2.4.55 or later.
Is CVE-2022-37436 being exploited?
There is no known exploitation of CVE-2022-37436 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as ALPINE-CVE-2022-37436, AZL-13167, AZL-43456, AZL-45000, BIT-apache-2022-37436, CLEANSTART-2026-WI35416 and 5 more.