This file is indexed.

/usr/lib/mono/2.0/Mono.Security.dll is in libmono-security2.0-cil 2.10.8.1-1ubuntu2.3.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/mono/2.0/../gac/Mono.Security/2.0.0.0__0738eb9f132ed756/Mono.Security.dll