{ "id": "CVE-2021-1236", "sourceIdentifier": "ykramarz@cisco.com", "published": "2021-01-13T22:15:20.583", "lastModified": "2023-05-22T18:57:24.750", "vulnStatus": "Modified", "descriptions": [ { "lang": "en", "value": "Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network." }, { "lang": "es", "value": "M\u00faltiples productos de Cisco est\u00e1n afectados por una vulnerabilidad en el motor de detecci\u00f3n de aplicaciones de Snort que podr\u00eda permitir a un atacante remoto no autenticado omitir las pol\u00edticas configuradas en un sistema afectado. La vulnerabilidad es debido a un fallo en el algoritmo de detecci\u00f3n. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de paquetes dise\u00f1ados que fluir\u00edan a trav\u00e9s de un sistema afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante omitir las pol\u00edticas configuradas y entregar una carga \u00fatil maliciosa a la red protegida." } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 3.9, "impactScore": 1.4 } ], "cvssMetricV30": [ { "source": "ykramarz@cisco.com", "type": "Secondary", "cvssData": { "version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 4.0, "baseSeverity": "MEDIUM" }, "exploitabilityScore": 2.2, "impactScore": 1.4 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "availabilityImpact": "NONE", "baseScore": 5.0 }, "baseSeverity": "MEDIUM", "exploitabilityScore": 10.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-670" } ] }, { "source": "ykramarz@cisco.com", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-670" } ] } ], "configurations": [ { "operator": "AND", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*", "versionEndExcluding": "17.4.1", "matchCriteriaId": "72B91784-38A9-4A2A-AA92-8AB558924BBD" } ] }, { "operator": "OR", "negate": false, "cpeMatch": [ { 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"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-app-bypass-cSBYCATq", "source": "ykramarz@cisco.com", "tags": [ "Vendor Advisory" ] }, { "url": "https://www.debian.org/security/2023/dsa-5354", "source": "ykramarz@cisco.com" } ] }