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CVE-2017-18365

9.8 · CRITICAL

The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code.

Published Mar 28, 2019CWE-502EPSS 21.24%

Overview

CVE-2017-18365 is a critical-severity vulnerability. It was published on March 28, 2019 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Management Console in GitHub Enterprise 2.8.x before 2.8.7 has a deserialization issue that allows unauthenticated remote attackers to execute arbitrary code. This occurs because the enterprise session secret is always the same, and can be found in the product's source code. By sending a crafted cookie signed with this secret, one can call Marshal.load with arbitrary data, which is a problem because the Marshal data format allows Ruby objects.

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

GitHubenterprise.github.com/releases/2.8.7/notesRefwww.exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.htmlGitHubenterprise.github.com/releases/2.8.7/notesRefwww.exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.html

How CyberStrike helps

Frequently asked questions

What is CVE-2017-18365?

CVE-2017-18365 is a critical-severity vulnerability. It was published on March 28, 2019 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

How severe is CVE-2017-18365?

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-18365?

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-2017-18365?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-18365 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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