{"dataType": "CVE_RECORD", "dataVersion": "5.0", "cveMetadata": {"cveId": "CVE-2023-20233", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "state": "PUBLISHED", "assignerShortName": "cisco", "dateReserved": "2022-10-27T18:47:50.369Z", "datePublished": "2023-09-13T16:40:15.314Z", "dateUpdated": "2024-01-25T16:58:27.181Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2024-01-25T16:58:27.181Z"}, "descriptions": [{"lang": "en", "value": "A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device."}], "affected": [{"vendor": "Cisco", "product": "Cisco IOS XR Software", "versions": [{"version": "5.2.0", "status": "affected"}, {"version": "5.2.1", "status": "affected"}, {"version": "5.2.2", "status": "affected"}, {"version": "5.2.4", "status": "affected"}, {"version": "5.2.3", "status": "affected"}, {"version": "5.2.5", "status": "affected"}, {"version": "5.3.0", "status": "affected"}, {"version": "5.3.1", "status": "affected"}, {"version": "5.3.2", "status": "affected"}, {"version": "5.3.3", "status": "affected"}, {"version": "5.3.4", "status": "affected"}, {"version": "6.1.1", "status": "affected"}, {"version": "6.1.2", "status": "affected"}, {"version": "6.1.3", "status": "affected"}, {"version": "6.1.4", "status": "affected"}, {"version": "6.2.1", "status": "affected"}, {"version": "6.2.2", "status": "affected"}, {"version": "6.2.3", "status": "affected"}, {"version": "6.2.25", "status": "affected"}, {"version": "6.3.2", "status": "affected"}, {"version": "6.3.3", "status": "affected"}, {"version": "6.3.15", "status": "affected"}, {"version": "6.4.1", "status": "affected"}, {"version": "6.4.2", "status": "affected"}, {"version": "6.4.3", "status": "affected"}, {"version": "6.5.1", "status": "affected"}, {"version": "6.5.2", "status": "affected"}, {"version": "6.6.2", "status": "affected"}, {"version": "6.6.3", "status": "affected"}, {"version": "6.6.25", "status": "affected"}, {"version": "6.6.4", "status": "affected"}, {"version": "7.0.1", "status": "affected"}, {"version": "7.0.2", "status": "affected"}, {"version": "7.1.1", "status": "affected"}, {"version": "7.1.15", "status": "affected"}, {"version": "7.1.2", "status": "affected"}, {"version": "7.1.3", "status": "affected"}, {"version": "6.7.1", "status": "affected"}, {"version": "6.7.2", "status": "affected"}, {"version": "6.7.3", "status": "affected"}, {"version": "6.7.4", "status": "affected"}, {"version": "7.2.1", "status": "affected"}, {"version": "7.2.2", "status": "affected"}, {"version": "7.3.1", "status": "affected"}, {"version": "7.3.2", "status": "affected"}, {"version": "7.3.3", "status": "affected"}, {"version": "7.4.1", "status": "affected"}, {"version": "7.4.2", "status": "affected"}, {"version": "6.8.1", "status": "affected"}, {"version": "6.8.2", "status": "affected"}, {"version": "7.5.1", "status": "affected"}, {"version": "7.5.3", "status": "affected"}, {"version": "7.5.2", "status": "affected"}, {"version": "7.6.1", "status": "affected"}, {"version": "7.6.2", "status": "affected"}, {"version": "7.7.1", "status": "affected"}, {"version": "7.7.2", "status": "affected"}, {"version": "6.9.1", "status": "affected"}, {"version": "6.9.2", "status": "affected"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "NULL Pointer Dereference", "type": "cwe", "cweId": "CWE-476"}]}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt", "name": "cisco-sa-ios-xr-cfm-3pWN8MKt"}], "metrics": [{"format": "cvssV3_1", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}}], "exploits": [{"lang": "en", "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}], "source": {"advisory": "cisco-sa-ios-xr-cfm-3pWN8MKt", "discovery": "INTERNAL", "defects": ["CSCwd75868"]}}}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "matchCriteriaId": "8460B545-0323-4B80-BB28-C553424A015B", "versionEndExcluding": "7.5.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "matchCriteriaId": "8775BE91-68A8-474E-94D1-D34604A027FA", "versionEndExcluding": "7.6.3", "versionStartIncluding": "7.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "matchCriteriaId": "5C1A7DEE-8745-418A-8F1E-AB3E22D8B12D", "versionEndExcluding": "7.7.21", "versionStartIncluding": "7.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "matchCriteriaId": "B7D6D905-28BD-4F5D-8884-4E3DEA205D97", "versionEndExcluding": "7.8.2", "versionStartIncluding": "7.8", "vulnerable": true}, {"criteria": "cpe:2.3:o:cisco:ios_xr:7.9.0:*:*:*:*:*:*:*", "matchCriteriaId": "3E05BB05-DEDD-433A-931E-88562C50726E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device."}, {"lang": "es", "value": "Una vulnerabilidad en la funci\u00f3n Connectivity Fault Management (CFM) del software Cisco IOS XR podr\u00eda permitir que un atacante remoto no autenticado cause una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe al procesamiento incorrecto de mensajes de verificaci\u00f3n de continuidad (CCM) no v\u00e1lidos. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando CCM manipulados a un dispositivo afectado. Una explotaci\u00f3n existosa podr\u00eda permitir al atacante provocar que el servicio CFM se bloquee cuando un usuario muestra informaci\u00f3n sobre los puntos finales de mantenimiento (MEP) para los MEP pares en un dispositivo afectado."}], "id": "CVE-2023-20233", "lastModified": "2024-01-25T17:15:39.480", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "ykramarz@cisco.com", "type": "Secondary"}]}, "published": "2023-09-13T17:15:09.523", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-354"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "ykramarz@cisco.com", "type": "Secondary"}]}

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