CVE-2021-21284
moby Access to remapped root allows privilege escalation to real root
6.8
MEDIUM
CVSS 3.1
EPSS 1.1%
描述
In Docker before versions 9.03.15, 20.10.3 there is a vulnerability involving the --userns-remap option in which access to remapped root allows privilege escalation to real root. When using "--userns-remap", if the root user in the remapped namespace has access to the host filesystem they can modify files under "/var/lib/docker/<remapping>" that cause writing files with extended privileges. Versions 20.10.3 and 19.03.15 contain patches that prevent privilege escalation from remapped user.
如何修補 CVE-2021-21284
要修補 CVE-2021-21284,請將受影響套件升級到下列已修補版本。
- —升級至 19.3.15 或更新版本
CVE-2021-21284 正在被利用嗎?
低 — EPSS 為 1.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 19.3.15
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |