CVE-2017-18078 in systemdinfo

Summary

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.

Reservation

01/28/2018

Disclosure

01/29/2018

Entries

VulDB provides additional information and datapoints for this CVE:

IDVulnerabilityCWEExpCouCVE
112610systemd systemd-tmpfiles access control264Proof-of-ConceptOfficial fixCVE-2017-18078

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