{"id":"CVE-2023-20168","state":"PUBLISHED","title":"A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly relo","description":"A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition. ","publishedAt":"2023-08-23T18:07:53.428Z","updatedAt":"2024-08-02T09:05:35.038Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/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","versions":[{"version":"4.2(1)SV1(4)","status":"affected"},{"version":"4.2(1)SV1(4a)","status":"affected"},{"version":"4.2(1)SV1(4b)","status":"affected"},{"version":"4.2(1)SV1(5.1)","status":"affected"},{"version":"4.2(1)SV1(5.1a)","status":"affected"},{"version":"4.2(1)SV1(5.2)","status":"affected"},{"version":"4.2(1)SV1(5.2b)","status":"affected"},{"version":"4.2(1)SV2(1.1)","status":"affected"},{"version":"4.2(1)SV2(1.1a)","status":"affected"},{"version":"4.2(1)SV2(2.1)","status":"affected"},{"version":"4.2(1)SV2(2.1a)","status":"affected"},{"version":"4.2(1)SV2(2.2)","status":"affected"},{"version":"4.2(1)SV2(2.3)","status":"affected"},{"version":"5.2(1)SM1(5.1)","status":"affected"},{"version":"5.2(1)SM1(5.2)","status":"affected"},{"version":"5.2(1)SM1(5.2a)","status":"affected"},{"version":"5.2(1)SM1(5.2b)","status":"affected"},{"version":"5.2(1)SM1(5.2c)","status":"affected"},{"version":"5.2(1)SM3(1.1)","status":"affected"},{"version":"5.2(1)SM3(1.1a)","status":"affected"},{"version":"5.2(1)SM3(1.1b)","status":"affected"},{"version":"5.2(1)SM3(1.1c)","status":"affected"},{"version":"5.2(1)SM3(2.1)","status":"affected"},{"version":"5.2(1)SV3(1.4)","status":"affected"},{"version":"5.2(1)SV3(1.1)","status":"affected"},{"version":"5.2(1)SV3(1.3)","status":"affected"},{"version":"5.2(1)SV3(1.5a)","status":"affected"},{"version":"5.2(1)SV3(1.5b)","status":"affected"},{"version":"5.2(1)SV3(1.6)","status":"affected"},{"version":"5.2(1)SV3(1.10)","status":"affected"},{"version":"5.2(1)SV3(1.15)","status":"affected"},{"version":"5.2(1)SV3(2.1)","status":"affected"},{"version":"5.2(1)SV3(2.5)","status":"affected"},{"version":"5.2(1)SV3(2.8)","status":"affected"},{"version":"5.2(1)SV3(3.1)","status":"affected"},{"version":"5.2(1)SV3(1.2)","status":"affected"},{"version":"5.2(1)SV3(1.4b)","status":"affected"},{"version":"5.2(1)SV3(3.15)","status":"affected"},{"version":"5.2(1)SV3(4.1)","status":"affected"},{"version":"5.2(1)SV3(4.1a)","status":"affected"},{"version":"5.2(1)SV3(4.1b)","status":"affected"},{"version":"5.2(1)SV3(4.1c)","status":"affected"},{"version":"6.0(2)A3(1)","status":"affected"},{"version":"6.0(2)A3(2)","status":"affected"},{"version":"6.0(2)A3(4)","status":"affected"},{"version":"6.0(2)A4(1)","status":"affected"},{"version":"6.0(2)A4(2)","status":"affected"},{"version":"6.0(2)A4(3)","status":"affected"},{"version":"6.0(2)A4(4)","status":"affected"},{"version":"6.0(2)A4(5)","status":"affected"},{"version":"6.0(2)A4(6)","status":"affected"},{"version":"6.0(2)A6(1)","status":"affected"},{"version":"6.0(2)A6(1a)","status":"affected"},{"version":"6.0(2)A6(2)","status":"affected"},{"version":"6.0(2)A6(2a)","status":"affected"},{"version":"6.0(2)A6(3)","status":"affected"},{"version":"6.0(2)A6(3a)","status":"affected"},{"version":"6.0(2)A6(4)","status":"affected"},{"version":"6.0(2)A6(4a)","status":"affected"},{"version":"6.0(2)A6(5)","status":"affected"},{"version":"6.0(2)A6(5a)","status":"affected"},{"version":"6.0(2)A6(5b)","status":"affected"},{"version":"6.0(2)A6(6)","status":"affected"},{"version":"6.0(2)A6(7)","status":"affected"},{"version":"6.0(2)A6(8)","status":"affected"},{"version":"6.0(2)A7(1)","status":"affected"},{"version":"6.0(2)A7(1a)","status":"affected"},{"version":"6.0(2)A7(2)","status":"affected"},{"version":"6.0(2)A7(2a)","status":"affected"},{"version":"6.0(2)A8(1)","status":"affected"},{"version":"6.0(2)A8(2)","status":"affected"},{"version":"6.0(2)A8(3)","status":"affected"},{"version":"6.0(2)A8(4)","status":"affected"},{"version":"6.0(2)A8(4a)","status":"affected"},{"version":"6.0(2)A8(5)","status":"affected"},{"version":"6.0(2)A8(6)","status":"affected"},{"version":"6.0(2)A8(7)","status":"affected"},{"version":"6.0(2)A8(7a)","status":"affected"},{"version":"6.0(2)A8(7b)","status":"affected"},{"version":"6.0(2)A8(8)","status":"affected"},{"version":"6.0(2)A8(9)","status":"affected"},{"version":"6.0(2)A8(10a)","status":"affected"},{"version":"6.0(2)A8(10)","status":"affected"},{"version":"6.0(2)A8(11)","status":"affected"},{"version":"6.0(2)A8(11a)","status":"affected"},{"version":"6.0(2)A8(11b)","status":"affected"},{"version":"6.0(2)U2(1)","status":"affected"},{"version":"6.0(2)U2(2)","status":"affected"},{"version":"6.0(2)U2(3)","status":"affected"},{"version":"6.0(2)U2(4)","status":"affected"},{"version":"6.0(2)U2(5)","status":"affected"},{"version":"6.0(2)U2(6)","status":"affected"},{"version":"6.0(2)U3(1)","status":"affected"},{"version":"6.0(2)U3(2)","status":"affected"},{"version":"6.0(2)U3(3)","status":"affected"},{"version":"6.0(2)U3(4)","status":"affected"},{"version":"6.0(2)U3(5)","status":"affected"},{"version":"6.0(2)U3(6)","status":"affected"},{"version":"6.0(2)U3(7)","status":"affected"},{"version":"6.0(2)U3(8)","status":"affected"},{"version":"6.0(2)U3(9)","status":"affected"},{"version":"6.0(2)U4(1)","status":"affected"},{"version":"6.0(2)U4(2)","status":"affected"},{"version":"6.0(2)U4(3)","status":"affected"},{"version":"6.0(2)U4(4)","status":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D1(1)","status":"affected"},{"version":"10.2(1)","status":"affected"},{"version":"10.2(1q)","status":"affected"},{"version":"10.2(2)","status":"affected"},{"version":"10.2(3)","status":"affected"},{"version":"10.2(3t)","status":"affected"},{"version":"10.2(4)","status":"affected"},{"version":"10.2(5)","status":"affected"},{"version":"7.3(9)D1(1)","status":"affected"},{"version":"7.3(11)N1(1)","status":"affected"},{"version":"7.3(12)N1(1)","status":"affected"},{"version":"10.3(1)","status":"affected"},{"version":"10.3(2)","status":"affected"},{"version":"7.3(13)N1(1)","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-remoteauth-dos-XB6pv74m"],"weaknesses":["CWE-120"],"ingestedAt":"2026-10-29T20:05:36.141Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/20xxx/CVE-2023-20168.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-20168","state":"PUBLISHED","datePublished":"2023-08-23T18:07:53.428Z","dateUpdated":"2024-08-02T09:05:35.038Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2022-10-27T18:47:50.362Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition. "}],"affected":[{"vendor":"Cisco","product":"Cisco NX-OS 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Copy without Checking Size of Input ('Classic Buffer Overflow')","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2024-01-25T16:57:48.712Z"},"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-remoteauth-dos-XB6pv74m","discovery":"EXTERNAL","defects":["CSCwe72368","CSCwe72670","CSCwe72648","CSCwe72673","CSCwe72674"]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-remoteauth-dos-XB6pv74m","name":"cisco-sa-nxos-remoteauth-dos-XB6pv74m","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T09:05:35.038Z"}}]}}}