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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
BACnet Interoperability Test Services, Inc. BACnet Test Server
Default version status: unaffected
0 to ≤ 1.01affected
References
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php ↗
- https://www.exploit-db.com/exploits/48860 ↗
- https://packetstormsecurity.com/files/159504 ↗
- https://cxsecurity.com/issue/WLB-2020100045 ↗
- https://www.bac-test.com/ ↗
- https://www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dos ↗