CVE-2020-36872
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| BACnet Interoperability Test Services, Inc. | BACnet Test Server | 0 <= 1.01 | affected |
Weaknesses
- CWE-400: CWE-400 Uncontrolled Resource Consumption
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
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
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