{"id":"CVE-2023-42818","state":"PUBLISHED","title":"SSH public key login without private key challenge if mfa is enabled in jumpserver","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.","publishedAt":"2023-09-27T20:28:30.507Z","updatedAt":"2025-03-25T19:28:32.560Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["jumpserver jumpserver"],"affected":[{"vendor":"jumpserver","product":"jumpserver","versions":[{"version":">= 3.6.0, < 3.6.5","status":"affected"},{"version":"< 3.5.6","status":"affected"}]}],"references":["https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv","https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2"],"weaknesses":["CWE-287"],"ingestedAt":"2026-10-29T20:06:17.512Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/42xxx/CVE-2023-42818.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-42818","state":"PUBLISHED","datePublished":"2023-09-27T20:28:30.507Z","dateUpdated":"2025-03-25T19:28:32.560Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2023-09-14T16:13:33.309Z"},"containers":{"cna":{"title":"SSH public key login without private key challenge if mfa is enabled in jumpserver","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"jumpserver","product":"jumpserver","versions":[{"version":">= 3.6.0, < 3.6.5","status":"affected"},{"version":"< 3.5.6","status":"affected"}]}],"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","tags":["x_refsource_CONFIRM"]},{"url":"https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2","name":"https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-03-25T19:28:32.560Z"},"source":{"advisory":"GHSA-jv3c-27cv-w8jv","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","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","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T19:30:24.806Z"}},{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"jumpserver","product":"jumpserver","defaultStatus":"unknown","versions":[{"version":"3.6.0","status":"affected","lessThan":"3.6.5","versionType":"custom"},{"version":"0","status":"affected","lessThan":"3.5.6","versionType":"custom"}],"cpes":["cpe:2.3:a:jumpserver:jumpserver:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-23T18:52:26.646507Z","id":"CVE-2023-42818","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-23T19:02:05.186Z"}}]}}}