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ALPINE-CVE-2021-44224

ALPINE-CVE-2021-44224 PUBLISHED CVSS 8.199999809265137 HIGH

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).

Risk Scores

CVSS v3.1
8.199999809265137
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected Products

VendorProductVersions
Alpine:v3.23apache22.2.21-r1, 0, 2.2.16-r0
Alpine:v3.14apache22.4.23-r5, 2.4.23-r7, 2.4.23-r8
Alpine:v3.20apache22.4.18-r1, 2.4.18-r0, 2.4.17-r7
Alpine:v3.13apache22.4.51-r0, 2.4.9-r1, 2.4.9-r0
Alpine:v3.22apache22.4.20-r2, 0, 2.2.16-r3
Alpine:v3.16apache22.4.27-r0, 2.4.9-r1, 2.4.9-r0
Alpine:v3.17apache22.4.39-r0, 2.2.16-r0, 2.2.16-r1
Alpine:v3.19apache22.4.26-r0, 2.4.9-r0, 2.4.7-r0
Alpine:v3.18apache22.2.22-r0, 0, 2.2.16-r0
Alpine:v3.12apache22.2.16-r0, 2.2.16-r1, 2.2.16-r2
Alpine:v3.15apache22.4.4-r0, 2.2.16-r1, 2.2.16-r2
Alpine:v3.21apache22.2.16-r1, 2.4.27-r1, 2.4.27-r2

Timeline

  • Dec 20, 2021 CVE Published
  • Dec 3, 2025 CVE Updated
  • Apr 30, 2026 Distribution Patch
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