CVE-2018-6954

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.

Published: Feb 13, 2018
Updated: Apr 13, 2023
CVE: CVE-2018-6954
Severity: High
Exploit:

CVSS v3:

Severity: High
Score: 7.8
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

Severity: High
Score: 7.2
AV:L/AC:L/Au:N/C:C/I:C/A:C

CWEs:

CWE-59

Affected Software
References

Software	From	Fixed in
systemd_project / systemd	-	237.x
canonical / ubuntu_linux	16.04	16.04.x
opensuse / leap	42.3	42.3.x
canonical / ubuntu_linux	18.04	18.04.x
canonical / ubuntu_linux	18.10	18.10.x

http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
https://github.com/systemd/systemd/issues/7986
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://usn.ubuntu.com/3816-1/
https://usn.ubuntu.com/3816-2/

Vulnerability Database

289,697

CVE-2018-6954