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CVE-2023-42818

5.4 · MEDIUM

JumpServer is an open source bastion host.

Published Sep 27, 2023CWE-287EPSS 0.68%

Overview

CVE-2023-42818 is a medium-severity vulnerability. It was published on September 27, 2023 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jvRefwww.sonarsource.com/blog/diving-into-jumpserver-attackers-gateway-to-internal-networks-1-2GitHubgithub.com/jumpserver/jumpserver/security/advisories/GHSA-jv3c-27cv-w8jv

How CyberStrike helps

Frequently asked questions

What is CVE-2023-42818?

CVE-2023-42818 is a medium-severity vulnerability. It was published on September 27, 2023 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2023-42818?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-42818?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-42818?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-42818 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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