{"api_version":"1","generated_at":"2026-05-06T11:11:58+00:00","cve":"CVE-2023-42818","urls":{"html":"https://cve.report/CVE-2023-42818","api":"https://cve.report/api/cve/CVE-2023-42818.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-42818","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-42818"},"summary":{"title":"CVE-2023-42818","description":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-09-27 21:15:00","updated_at":"2023-10-02 19:59:00"},"problem_types":["CWE-307"],"metrics":[],"references":[{"url":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv","name":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv","refsource":"MISC","tags":[],"title":"SSH public key login without private key challenge if mfa is enabled. · Advisory · jumpserver/jumpserver · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-42818","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42818","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"42818","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"fit2cloud","cpe5":"jumpserver","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-42818","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-287: Improper Authentication","cweId":"CWE-287"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"jumpserver","product":{"product_data":[{"product_name":"jumpserver","version":{"version_data":[{"version_affected":"=","version_value":">= 3.6.0, < 3.6.5"},{"version_affected":"=","version_value":"< 3.5.6"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv","refsource":"MISC","name":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv"}]},"source":{"advisory":"GHSA-jv3c-27cv-w8jv","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","version":"3.1"}]}},"nvd":{"publishedDate":"2023-09-27 21:15:00","lastModifiedDate":"2023-10-02 19:59:00","problem_types":["CWE-307"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*","versionStartIncluding":"3.6.0","versionEndExcluding":"3.6.5","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*","versionEndExcluding":"3.5.6","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}