CVE-2023-42818
SSH public key login without private key challenge if mfa is enabled in jumpserver
- State
- Published
- Severity
- 5.4 Medium
- Published
- Sep 27, 2023
- Updated
- Mar 25, 2025
- Reserved
- Sep 14, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L | GitHub_M |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
jumpserverjumpserver |
|
References
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