Race condition in coreutils - CVE-2017-18018
Published: January 4, 2018 / Updated: August 3, 2020
Vulnerability identifier: #VU33153
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-18018
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
coreutils
coreutils
Detailed vulnerability description
The vulnerability allows a local authenticated user to manipulate data.
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.
How to mitigate CVE-2017-18018
Install update from vendor's website.