Unrated severityNVD Advisory· Published Sep 27, 2023· Updated Mar 25, 2025
SSH public key login without private key challenge if mfa is enabled in jumpserver
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.
Affected products
1- Range: >= 3.6.0, < 3.6.5
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- github.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jvmitrex_refsource_CONFIRM
- www.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2mitrex_refsource_MISC
News mentions
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