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Debian: CVE-2017-18078: systemd -- security update

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Debian: CVE-2017-18078: systemd -- security update

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
01/29/2018
Created
04/26/2019
Added
04/25/2019
Modified
02/24/2020

Description

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.

Solution(s)

  • debian-upgrade-systemd

References

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