CVE-2021-44224

HighCVSS 8.2/10Last modified Jun 17, 2026

Description

A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).

Metrics

CVSS 3.1 8.2/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published: Dec 20, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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