Time-of-check Time-of-use (TOCTOU) Affecting systemd-libs package, versions *


0.0
medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.06% (26th 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-CENTOS7-SYSTEMDLIBS-1982654
  • published 26 Jul 2021
  • disclosed 24 Dec 2017

How to fix?

There is no fixed version for Centos:7 systemd-libs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd-libs package and not the systemd-libs package as distributed by Centos. See How to fix? for Centos:7 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.