CVE-2023-42818 MEDIUM

CVE-2023-42818: SSH public key login without private key challenge if mfa is enabled in jumpserver

Vendor Jumpserver
Product jumpserver
Weakness CWE-287 · Improper authentication
Published September 27, 2023
Last update March 25, 2025
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 27, 2023 CVE published
March 25, 2025 Record updated