/usr/lib/x86_64-linux-gnu/libasn1cmbuf.so is in libsnacc-dev 1.3.1-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libasn1cmbuf.so.0.0.0
/usr/lib/x86_64-linux-gnu/libasn1cmbuf.so.0.0.0