CVE-2021-42013
Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)
描述
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.
如何修補 CVE-2021-42013
要修補 CVE-2021-42013,請將受影響套件升級到下列已修補版本。
- —升級至 2.4.51-r0 或更新版本
- —升級至 2.4.50 或更新版本
- —升級至 2.4.51-1 或更新版本
CVE-2021-42013 正在被利用嗎?
是 — CVE-2021-42013 已列入 CISA Known Exploited Vulnerabilities (KEV) 清單,代表正在被實際利用,請立即修補。
受影響套件(3)
- from 0, < 2.4.51-r0
- >= 2.4.49, < 2.4.50, >= 2.4.50, < 2.4.51
- from 0, < 2.4.51-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |