CVE-2021-41091
Moby (Docker Engine) Insufficiently restricted permissions on data directory in github.com/docker/docker
描述
Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade limit access to the host to trusted users. Limit access to host volumes to trusted containers.
如何修補 CVE-2021-41091
要修補 CVE-2021-41091,請將受影響套件升級到下列已修補版本。
- —升級至 20.10.9 或更新版本
- —升級至 20.10.9 或更新版本
CVE-2021-41091 正在被利用嗎?
低 — EPSS 為 2.7%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 20.10.9
- from 0, < 20.10.9
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |