CVE-2022-41720
Restricted file access on Windows in os and net/http
描述
On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system. With fix applied, the behavior of os.DirFS("") has changed. Previously, an empty root was treated equivalently to "/", so os.DirFS("").Open("tmp") would open the path "/tmp". This now returns an error.
如何修補 CVE-2022-41720
要修補 CVE-2022-41720,請將受影響套件升級到下列已修補版本。
- —升級至 1.18.9 或更新版本
- —未列出修補版本
- —升級至 1.19.4-1 或更新版本
- —升級至 1.18.9 或更新版本
CVE-2022-41720 正在被利用嗎?
低 — EPSS 為 0.0%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0, < 1.18.9, >= 1.19.0, < 1.19.4
- from 0
- from 0, < 1.19.4-1
- from 0, < 1.18.9, >= 1.19.0-0, < 1.19.4
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |