CVE-2017-18078
systemd - security update
7.8
HIGH
CVSS 3.1
EPSS 1.1%
描述
systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.
如何修補 CVE-2017-18078
要修補 CVE-2017-18078,請將受影響套件升級到下列已修補版本。
- —升級至 237-1 或更新版本
- —升級至 215-17+deb8u12 或更新版本
CVE-2017-18078 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(2)
- from 0, < 237-1
- from 0, < 215-17+deb8u12
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |