VDB
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
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.23 | apache2 | 2.2.21-r1, 0, 2.2.16-r0 |
| Alpine:v3.14 | apache2 | 2.4.23-r5, 2.4.23-r7, 2.4.23-r8 |
| Alpine:v3.20 | apache2 | 2.4.18-r1, 2.4.18-r0, 2.4.17-r7 |
| Alpine:v3.13 | apache2 | 2.4.51-r0, 2.4.9-r1, 2.4.9-r0 |
| Alpine:v3.22 | apache2 | 2.4.20-r2, 0, 2.2.16-r3 |
| Alpine:v3.16 | apache2 | 2.4.27-r0, 2.4.9-r1, 2.4.9-r0 |
| Alpine:v3.17 | apache2 | 2.4.39-r0, 2.2.16-r0, 2.2.16-r1 |
| Alpine:v3.19 | apache2 | 2.4.26-r0, 2.4.9-r0, 2.4.7-r0 |
| Alpine:v3.18 | apache2 | 2.2.22-r0, 0, 2.2.16-r0 |
| Alpine:v3.12 | apache2 | 2.2.16-r0, 2.2.16-r1, 2.2.16-r2 |
| Alpine:v3.15 | apache2 | 2.4.4-r0, 2.2.16-r1, 2.2.16-r2 |
| Alpine:v3.21 | apache2 | 2.2.16-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