{ "id": "CVE-2023-20169", "sourceIdentifier": "ykramarz@cisco.com", "published": "2023-08-23T19:15:07.893", "lastModified": "2024-01-25T17:15:32.007", "vulnStatus": "Modified", "descriptions": [ { "lang": "en", "value": "A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco NX-OS Software for the Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload.\r\n\r This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition due to the unexpected restart of the IS-IS process, which could cause the affected device to reload. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2 adjacent to the affected device." } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH" }, "exploitabilityScore": 2.8, "impactScore": 4.0 }, { "source": "ykramarz@cisco.com", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH" }, "exploitabilityScore": 2.8, "impactScore": 4.0 } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "CWE-20" } ] }, { "source": "ykramarz@cisco.com", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-788" } ] } ], "configurations": [ { "operator": "AND", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:cisco:nx-os:10.3\\(2\\):*:*:*:*:*:*:*", "matchCriteriaId": "8CE0E36D-08A6-48D5-A364-AC066F30F3CB" } ] }, { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": false, "criteria": "cpe:2.3:h:cisco:nexus_3048:-:*:*:*:*:*:*:*", "matchCriteriaId": "FC2A6C31-438A-4CF5-A3F3-364B1672EB7D" }, { "vulnerable": false, "criteria": "cpe:2.3:h:cisco:nexus_31108pc-v:-:*:*:*:*:*:*:*", "matchCriteriaId": "4E930332-CDDD-48D5-93BC-C22D693BBFA2" }, { "vulnerable": false, "criteria": "cpe:2.3:h:cisco:nexus_31108tc-v:-:*:*:*:*:*:*:*", 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