Vulnerability Description
BACnet Test Server versions up to and including 1.01 contains a remote denial of service vulnerability in its BACnet/IP BVLC packet handling. The server fails to properly validate the BVLC Length field in incoming UDP BVLC frames on the default BACnet port (47808/udp). A remote unauthenticated attacker can send a malformed BVLC Length value to trigger an access violation and crash the application, resulting in a denial of service.
Related Weaknesses (CWE)
References
- https://cxsecurity.com/issue/WLB-2020100045
- https://packetstormsecurity.com/files/159504
- https://www.bac-test.com/
- https://www.exploit-db.com/exploits/48860
- https://www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-do
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php
FAQ
What is CVE-2020-36872?
CVE-2020-36872 is a documented vulnerability. BACnet Test Server versions up to and including 1.01 contains a remote denial of service vulnerability in its BACnet/IP BVLC packet handling. The server fails to properly validate the BVLC Length fiel...
How severe is CVE-2020-36872?
CVSS scoring is not yet available for CVE-2020-36872. Check NVD for updates.
Is there a patch for CVE-2020-36872?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.