Description
A flaw was found in GNU Coreutils through 8.29 in chown-core.c. The
functions chown and chgrp do 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 (CVE-2017-18018).
A flaw was found in Gnulib before 2018-09-23. The convert_to_decimal
function in vasnprintf.c has a heap-based buffer overflow because memory
is not allocated for a trailing '\0' character during %f processing
(CVE-2018-17942).