GNU LibreDWG null pointer back-reference vulnerability (CNVD-2019-12558)

GNU LibreDWG is a GNU Project C library for working with DWG files. A null pointer back-reference vulnerability exists in the 'dwgdxfLTYPE' function of the dwg.spec file in GNU LibreDWG version 0.7 and 0.7.1645. An attacker could exploit this vulnerability to cause a denial of service...