CVE-2021-22968
Improper file handling in concrete5/core
描述
A bypass of adding remote files in Concrete CMS (previously concrete5) File Manager leads to remote code execution in Concrete CMS (concrete5) versions 8.5.6 and below. The external file upload feature stages files in the public directory even if they have disallowed file extensions. They are stored in a directory with a random name, but it's possible to stall the uploads and brute force the directory name. You have to be an admin with the ability to upload files, but this bug gives you the ability to upload restricted file types and execute them depending on server configuration. To fix this, a check for allowed file extensions was added before downloading files to a tmp directory
如何修補 CVE-2021-22968
要修補 CVE-2021-22968,請將受影響套件升級到下列已修補版本。
- —升級至 8.5.7 或更新版本
CVE-2021-22968 正在被利用嗎?
低 — EPSS 為 3.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 8.5.7
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |