GNU LibreDWG 0.9.3.2564 has an invalid pointer dereference in dwg_dynapi_entity_value in dynapi.c (dynapi.c is generated by gen-dynapi.pl).
https://github.com/LibreDWG/libredwg/issues/179#issuecomment-570447223
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00052.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00046.html