Apache · Apache Http Server · CVE-2022-37436
**Name of the Vulnerable Software and Affected Versions**
Apache HTTP Server versions prior to 2.4.55
**Description**
The issue is related to the mod proxy module in Apache HTTP Server, where it fails to properly handle CRLF sequences in HTTP headers. This can be exploited by a remote attacker to perform HTTP response splitting attacks. A malicious backend can cause response headers to be truncated early, resulting in some headers being incorporated into the response body, which can bypass security measures if those headers have a security purpose.
**Recommendations**
For versions prior to 2.4.55, update to Apache HTTP Server version 2.4.55 or later to resolve the issue. As a temporary workaround, consider restricting access to the mod proxy module to minimize the risk of exploitation.