[3.5] coreutils: privilege escalation via recursive dereferences (CVE-2017-18018)

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.

References:

http://www.openwall.com/lists/oss-security/2018/01/04/3
https://nvd.nist.gov/vuln/detail/CVE-2017-18018

(from redmine: issue id 9276, created on 2018-08-17, closed on 2019-05-04)

• Relations:
  • copied_to #9272
  • parent #9272