CVE-2017-18078
HIGH7.8EPSS 0.08%systemd - security update
Published: 1/29/2018Modified: 4/28/2026
Description
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.
Affected packages (2)
- Debian/systemdfrom 0, < 237-1
- Debian/systemdfrom 0, < 215-17+deb8u12
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| 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 |