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CVE-2017-18018

Published: 4 January 2018

In 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.

Notes

AuthorNote
ccdm94
It seems like this will not be fixed upstream (due to the
nature of the chown and chgrp utilities), the available
patch being a documentation change to warn users about
insecure software behavior when certain options are used
together in chown and chgrp. For this reason, we will not
be fixing this issue in releases where it would be needed.
These will be marked as ignored.

Priority

Low

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package Release Status
coreutils
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Ignored
(documentation patch only)
cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable
(8.30-3ubuntu2)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Not vulnerable
(8.32-4ubuntu2)
jammy Not vulnerable
(8.32-4ubuntu3)
trusty Ignored
(documentation patch only)
upstream Ignored

xenial Ignored
(documentation patch only)
zesty Ignored
(end of life)

Severity score breakdown

Parameter Value
Base score 4.7
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N