CVSS 3.1 Score 5.4 of 10 (medium)


Published Sep 27, 2023
Updated: Oct 2, 2023
CWE ID 287
CWE ID 307


CVE-2023-42818 is a vulnerability affecting JumpServer, an open source bastion host. The vulnerability occurs when users enable multi-factor authentication (MFA) and use a public key for authentication. The Koko SSH server does not verify the corresponding SSH private key, allowing an attacker to exploit the vulnerability through brute-force authentication attempts using a disclosed public key. The issue has been patched in versions 3.6.5 and 3.5.6 of JumpServer, and users are advised to upgrade to these versions to remediate the vulnerability. There are no known workarounds for this issue. The potential danger posed by this vulnerability is rated as medium, with a base severity score of 5.4 out of 10, according to the CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L.


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