{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2020-36872","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2025-10-30T15:45:57.763Z","datePublished":"2025-11-26T22:13:47.565Z","dateUpdated":"2026-05-14T02:06:36.867Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"BACnet Test Server","vendor":"BACnet Interoperability Test Services, Inc.","versions":[{"lessThanOrEqual":"1.01","status":"affected","version":"0","versionType":"custom"}]}],"credits":[{"lang":"en","type":"finder","value":"Gjoko Krstic of Zero Science Lab"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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."}],"value":"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":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-05-14T02:06:36.867Z"},"references":[{"tags":["technical-description","exploit"],"url":"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5597.php"},{"tags":["exploit"],"url":"https://www.exploit-db.com/exploits/48860"},{"tags":["exploit"],"url":"https://packetstormsecurity.com/files/159504"},{"tags":["exploit"],"url":"https://cxsecurity.com/issue/WLB-2020100045"},{"tags":["product"],"url":"https://www.bac-test.com/"},{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/bacnet-test-server-malformed-bvlc-length-dos"}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2020-06-10T16:00:00.000Z","value":"Exploit is publicly disclosed"}],"title":"BACnet Test Server 1.01 Malformed BVLC Length DoS","x_generator":{"engine":"Vulnogram 0.5.0"},"datePublic":"2020-10-07T00:00:00.000Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-28T19:22:16.357276Z","id":"CVE-2020-36872","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-11-28T19:22:56.721Z"}}]}}