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systemd-tmpfiles in systemd through 237 mishandles...

High severity Unreviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

No package listed— Suggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

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

Published by the National Vulnerability Database Feb 13, 2018
Published to the GitHub Advisory Database May 13, 2022
Last updated Feb 1, 2023

Severity

High
7.8
/ 10

CVSS base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2018-6954

GHSA ID

GHSA-fgm4-rh7c-g9fg

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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