Arbitrary Code Execution Affecting systemd/systemd package, versions [,238)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.53% (42nd percentile)

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  • Snyk IDSNYK-UNMANAGED-SYSTEMDSYSTEMD-2365469
  • published26 Jan 2022
  • disclosed13 Feb 2018
  • creditUnknown

Introduced: 13 Feb 2018

CVE-2018-6954  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade systemd/systemd to version 238 or higher.

Overview

Affected versions of this package are vulnerable to Arbitrary Code Execution 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

CVSS Base Scores

version 3.1