Link Following Affecting systemd package, versions *


low

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.06% (25th percentile)
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NVD
7.8 high
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Red Hat
6.7 medium

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  • Snyk ID SNYK-DEBIAN9-SYSTEMD-305165
  • published 29 Jan 2018
  • disclosed 29 Jan 2018

How to fix?

There is no fixed version for Debian:9 systemd.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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.