{"containers":{"cna":{"affected":[{"product":"Cisco NX-OS Software","vendor":"Cisco","versions":[{"status":"affected","version":"n/a"}]}],"datePublic":"2021-08-25T00:00:00.000Z","descriptions":[{"lang":"en","value":"A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condition. This vulnerability is due to a logic error in the implementation of the system login block-for command when an attack is detected and acted upon. An attacker could exploit this vulnerability by performing a brute-force login attack on an affected device. A successful exploit could allow the attacker to cause a login process to reload, which could result in a delay during authentication to the affected device."}],"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","description":"CWE-787","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2021-08-25T19:11:18.000Z","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco"},"references":[{"name":"20210825 Cisco NX-OS Software system login block-for Denial of Service Vulnerability","tags":["vendor-advisory","x_refsource_CISCO"],"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu"}],"source":{"advisory":"cisco-sa-nxos-login-blockfor-RwjGVEcu","defect":[["CSCuz49095","CSCvw45963","CSCvx74585"]],"discovery":"INTERNAL"},"title":"Cisco NX-OS Software system login block-for Denial of Service Vulnerability","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"psirt@cisco.com","DATE_PUBLIC":"2021-08-25T16:00:00","ID":"CVE-2021-1590","STATE":"PUBLIC","TITLE":"Cisco NX-OS Software system login block-for Denial of Service Vulnerability"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Cisco NX-OS Software","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"Cisco"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condition. This vulnerability is due to a logic error in the implementation of the system login block-for command when an attack is detected and acted upon. An attacker could exploit this vulnerability by performing a brute-force login attack on an affected device. A successful exploit could allow the attacker to cause a login process to reload, which could result in a delay during authentication to the affected device."}]},"exploit":[{"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."}],"impact":{"cvss":{"baseScore":"5.3","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.0"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-787"}]}]},"references":{"reference_data":[{"name":"20210825 Cisco NX-OS Software system login block-for Denial of Service Vulnerability","refsource":"CISCO","url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu"}]},"source":{"advisory":"cisco-sa-nxos-login-blockfor-RwjGVEcu","defect":[["CSCuz49095","CSCvw45963","CSCvx74585"]],"discovery":"INTERNAL"}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T16:18:10.362Z"},"title":"CVE Program Container","references":[{"name":"20210825 Cisco NX-OS Software system login block-for Denial of Service Vulnerability","tags":["vendor-advisory","x_refsource_CISCO","x_transferred"],"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-login-blockfor-RwjGVEcu"}]},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-11-07T21:54:24.586511Z","id":"CVE-2021-1590","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-07T22:02:13.143Z"}}]},"cveMetadata":{"assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","assignerShortName":"cisco","cveId":"CVE-2021-1590","datePublished":"2021-08-25T19:11:18.814Z","dateReserved":"2020-11-13T00:00:00.000Z","dateUpdated":"2024-11-07T22:02:13.143Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}