CVE-2018-6954
HIGHsystemd < 237 - Local Privilege Escalation via Symlink Handling in systemd-tmpfiles
Title source: llmDescription
systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local users to obtain ownership of arbitrary files via vectors involving creation of a directory and a file under that directory, and later replacing that directory with a symlink. This occurs even if the fs.protected_symlinks sysctl is turned on.
References (6)
Core 6
Core References
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3816-2/
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://github.com/systemd/systemd/issues/7986
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3816-1/
Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Scores
CVSS v3
7.8
EPSS
0.0014
EPSS Percentile
34.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-59
Status
published
Products (5)
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
18.10
opensuse/leap
42.3
systemd_project/systemd
< 237
Published
Feb 13, 2018
Tracked Since
Feb 18, 2026