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CVE-2020-36872 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  VulnCheck
CVSS-B 8.7 HIGH
Vector:  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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cxsecurity.com/issue/WLB-2020100045 VulnCheck
https://packetstormsecurity.com/files/159504 VulnCheck
https://www.bac-test.com/ VulnCheck
https://www.exploit-db.com/exploits/48860 VulnCheck
https://www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dos VulnCheck
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php VulnCheck

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption VulnCheck  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-36872
NVD Published Date:
11/26/2025
NVD Last Modified:
11/26/2025
Source:
VulnCheck