{"schema_version":"1.9.0","id":"CVE-2023-42818","published":"2023-09-27T20:28:30.507Z","modified":"2026-08-12T03:51:12.593975824Z","aliases":["GHSA-jv3c-27cv-w8jv","GO-2025-3570"],"related":["openSUSE-SU-2025:15225-1"],"summary":"SSH public key login without private key challenge if mfa is enabled in jumpserver","details":"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":[{"ranges":[{"type":"GIT","repo":"https://github.com/jumpserver/jumpserver","events":[{"introduced":"0"},{"fixed":"1b157a107e15dc4eb5bca689f90a98333429c1ae"},{"introduced":"cb11cb17742377ea9baba8d9d4301306b9de7f51"},{"fixed":"811d64be69c242719be21275f29558cb12671e77"}],"database_specific":{"cpe":"cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"3.5.6"},{"introduced":"3.6.0"},{"fixed":"3.6.5"}],"source":"CPE_RANGE"}}],"versions":["v2.27.0","v2.26.0","v2.25.0","v2.24.0","v2.23.0","v2.22.0","v2.21.0","v2.20.0","v2.19.0","v2.18.1","v2.18.0","v2.17.0","v2.15.1","v2.15.0","v2.13.0","v2.12.0","v2.11.0","v2.10.0","v2.9.0","v2.8.0","v2.7.0","v2.6.0","v2.5.0","v2.4.0","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.0","1.5.9","1.5.8","1.5.7","1.5.6","1.5.5","1.5.4","1.5.3","1.5.2","1.5.1","1.5.0","v1.4.10","1.4.10","1.4.9","1.4.8","1.4.7","v1.4.7","1.4.6","1.4.5","1.4.4","v1.4.4","1.4.3","1.4.2","1.4.1","1.4.0","1.3.3","1.3.2","1.3.1","1.3.0","1.2.1","1.2.0","1.1.1","1.1.0","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-42818.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42818.json"},{"type":"ADVISORY","url":"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-42818"},{"type":"ARTICLE","url":"https://www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-287"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42818.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L"}]}