CVE-2017-18018

NameCVE-2017-18018
DescriptionIn GNU Coreutils through 8.29, chown-core.c in chown and chgrp does not prevent replacement of a plain file with a symlink during use of the POSIX "-R -L" options, which allows local users to modify the ownership of arbitrary files by leveraging a race condition.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
coreutils (PTS)jessie8.23-4vulnerable
stretch8.26-3vulnerable
buster, sid8.30-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
coreutilssource(unstable)(unfixed)unimportant

Notes

http://lists.gnu.org/archive/html/coreutils/2017-12/msg00045.html
http://www.openwall.com/lists/oss-security/2018/01/04/3
Documentation patches proposed:
https://lists.gnu.org/archive/html/coreutils/2017-12/msg00072.html
https://lists.gnu.org/archive/html/coreutils/2017-12/msg00073.html
Neutralised by kernel hardening

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