{"id":"CVE-2024-20446","state":"PUBLISHED","title":"Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability","description":"A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.","publishedAt":"2024-08-28T16:31:32.514Z","updatedAt":"2024-08-28T18:49:32.927Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco NX-OS Software"],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS Software","defaultStatus":"unknown","versions":[{"version":"10.2(1)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"8.2(11)","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:06:59.846Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/20xxx/CVE-2024-20446.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-20446","state":"PUBLISHED","datePublished":"2024-08-28T16:31:32.514Z","dateUpdated":"2024-08-28T18:49:32.927Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2023-11-08T15:08:07.678Z"},"containers":{"cna":{"title":"Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition."}],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS Software","defaultStatus":"unknown","versions":[{"version":"10.2(1)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"9.3(9)","status":"affected"},{"version":"8.2(11)","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn","name":"cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","description":"NULL Pointer Dereference","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2024-08-28T16:31:32.514Z"},"exploits":[{"lang":"en","value":"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"source":{"advisory":"cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn","discovery":"EXTERNAL","defects":["CSCwk27906"]}},"adp":[{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"cisco","product":"nx-os","defaultStatus":"unknown","versions":[{"version":"10.2\\(1\\)","status":"affected"}],"cpes":["cpe:2.3:o:cisco:nx-os:10.2\\(1\\):*:*:*:*:*:*:*"]},{"vendor":"cisco","product":"nx-os","defaultStatus":"unknown","versions":[{"version":"10.2\\(1q\\)","status":"affected"}],"cpes":["cpe:2.3:o:cisco:nx-os:10.2\\(1q\\):*:*:*:*:*:*:*"]},{"vendor":"cisco","product":"nx-os","defaultStatus":"unknown","versions":[{"version":"9.3\\(9\\)","status":"affected"}],"cpes":["cpe:2.3:o:cisco:nx-os:9.3\\(9\\):*:*:*:*:*:*:*"]},{"vendor":"cisco","product":"nx-os","defaultStatus":"unknown","versions":[{"version":"8.2\\(11\\)","status":"affected"}],"cpes":["cpe:2.3:o:cisco:nx-os:8.2\\(11\\):*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-08-28T18:45:44.020456Z","id":"CVE-2024-20446","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-08-28T18:49:32.927Z"}}]}}}