VDB
ALPINE-CVE-2021-42013
ALPINE-CVE-2021-42013
PUBLISHED
CVSS 9.800000190734863 CRITICAL
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
Risk Scores
CVSS v3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.16 | apache2 | 2.2.21-r1, 2.4.12-r3, 2.4.12-r4 |
| Alpine:v3.11 | apache2 | 0, 2.4.9-r1, 2.4.7-r0 |
| Alpine:v3.19 | apache2 | 2.2.22-r0, 2.4.9-r1, 2.4.29-r1 |
| Alpine:v3.12 | apache2 | 2.4.9-r0, 2.4.7-r0, 2.4.6-r4 |
| Alpine:v3.23 | apache2 | 2.4.27-r1, 0, 2.2.16-r0 |
| Alpine:v3.14 | apache2 | 2.4.46-r2, 2.4.9-r1, 2.4.9-r0 |
| Alpine:v3.22 | apache2 | 2.2.21-r0, 2.2.21-r1, 2.2.21-r2 |
| Alpine:v3.15 | apache2 | 2.4.9-r1, 0, 2.2.16-r0 |
| Alpine:v3.18 | apache2 | 2.2.17-r5, 2.2.17-r3, 2.2.17-r1 |
| Alpine:v3.13 | apache2 | 2.4.18-r0, 2.4.18-r2, 2.4.20-r0 |
| Alpine:v3.17 | apache2 | 2.4.9-r0, 2.4.10-r0, 2.4.46-r2 |
| Alpine:v3.21 | apache2 | 2.4.46-r0, 2.4.9-r1, 2.4.25-r1 |
| Alpine:v3.20 | apache2 | 2.2.16-r0, 2.4.23-r9, 2.4.25-r1 |
Timeline
- Oct 7, 2021 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch