CVE-2020-22552

{"id": "CVE-2020-22552", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2020-10-28T14:15:12.253", "references": [{"url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://sourceforge.net/projects/snap7/", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://sourceforge.net/p/snap7/discussion/bugfix/thread/456d76fdde/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://sourceforge.net/projects/snap7/", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed."}, {"lang": "es", "value": "El componente Snap7 server en versi\u00f3n 1.4.1, cuando un atacante env\u00eda un paquete dise\u00f1ado con el flag last-data-unitel del protocolo COTP establece que No y S7 escribe una funci\u00f3n var, el servidor de Snap7 se bloquear\u00e1"}], "lastModified": "2026-07-09T00:16:58.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:snap7_project:snap7:1.4.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C87485B5-06EE-4FE4-A999-54074EFE2C74"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}