CVE-2017-18078 — Vulnetix

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CVE-2017-18078 PUBLISHED

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.

EPSS 0.08% · 24.5th percentile

Risk Scores

EPSS Score

0.08%

24.5th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:Pro:14.04:LTS	systemd	0, 204-0ubuntu18, 204-0ubuntu19
Ubuntu:Pro:16.04:LTS	systemd	0, 225-1ubuntu9, 227-2ubuntu1

Timeline

Jan 29, 2018 CVE Published
Jan 31, 2018 PoC Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Aug 23, 2021 EPSS Score
Oct 24, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 28, 2022 EPSS Score
Aug 31, 2022 EPSS Score
Nov 1, 2022 EPSS Score

References

https://ubuntu.com/security/CVE-2017-18078 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2017-18078 third-party-advisory

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