An issue was discovered in Open Design Alliance Drawings SDK before 2021.11. A Type Confusion issue exists when rendering malformed .DXF and .DWG files. This can allow attackers to cause a crash, potentially enabling a denial of service attack (Crash, Exit, or Restart).
https://www.zerodayinitiative.com/advisories/ZDI-21-219/
https://www.opendesign.com/security-advisories
https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdf