CVE-2025-66624

{"id": "CVE-2025-66624", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2025-12-05T19:15:53.120", "references": [{"url": "https://github.com/bacnet-stack/bacnet-stack/commit/9378f7d1e70169ebde4a5090bae7603703eadf48", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-8wgw-5h6x-qgqg", "tags": ["Vendor Advisory", "Exploit"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "BACnet Protocol Stack library provides a BACnet application layer, network layer and media access (MAC) layer communications services. Prior to 1.5.0.rc2, The npdu_is_expected_reply function in src/bacnet/npdu.c indexes request_pdu[offset+2/3/5] and reply_pdu[offset+1/2/4] without verifying that those APDU bytes exist. bacnet_npdu_decode() can return offset == 2 for a 2-byte NPDU, so tiny PDUs pass the version check and then get read out of bounds. On ASan/MPU/strict builds this is an immediate crash (DoS). On unprotected builds it is undefined behavior and can mis-route replies; RCE is unlikely because only reads occur, but DoS is reliable."}, {"lang": "es", "value": "La biblioteca de la pila de protocolos BACnet proporciona servicios de comunicaci\u00f3n de capa de aplicaci\u00f3n BACnet, capa de red y capa de acceso al medio (MAC). Versiones anteriores a 1.5.0.rc2, la funci\u00f3n npdu_is_expected_reply en src/bacnet/npdu.c indexa request_pdu[offset+2/3/5] y reply_pdu[offset+1/2/4] sin verificar que esos bytes APDU existan. bacnet_npdu_decode() puede devolver offset == 2 para una NPDU de 2 bytes, por lo que las PDU peque\u00f1as pasan la verificaci\u00f3n de versi\u00f3n y luego se leen fuera de los l\u00edmites. En compilaciones ASan/MPU/estrictas, esto es un fallo inmediato (DoS). En compilaciones desprotegidas, es un comportamiento indefinido y puede enrutar mal las respuestas; RCE es poco probable porque solo ocurren lecturas, pero DoS es fiable."}], "lastModified": "2026-02-18T18:21:54.343", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:bacnetstack:bacnet_stack:1.5.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2B47182E-6B7F-4C53-904A-EB37C9C0A439"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}