CVE-2020-10518: Unsafe configuration options in GitHub Pages leading to remote code execution on GitHub Enterprise Server
First published: Thu Aug 27 2020(Updated: )
A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration of the underlying parsers used by GitHub Pages were not sufficiently restricted and made it possible to execute commands on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 2.22 and was fixed in 2.21.6, 2.20.15, and 2.19.21. The underlying issues contributing to this vulnerability were identified both internally and through the GitHub Security Bug Bounty program.
Credit: product-cna@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GitHub GitHub | <2.19.21 | |
| GitHub GitHub | >=2.20.0<2.20.15 | |
| GitHub GitHub | >=2.21.0<2.21.6 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2020-10518?
The severity of CVE-2020-10518 is high (8.8).
What is the affected software of CVE-2020-10518?
The affected software of CVE-2020-10518 is GitHub Enterprise Server versions 2.19.21, 2.20.0 to 2.20.15, and 2.21.0 to 2.21.6.
How can CVE-2020-10518 be exploited?
CVE-2020-10518 can be exploited when building a GitHub Pages site by user-controlled configuration of the underlying parsers used by GitHub Pages.
How can I fix CVE-2020-10518?
To fix CVE-2020-10518, users should update their GitHub Enterprise Server installations to a version that includes the necessary security patches.
Is there any additional information available about CVE-2020-10518?
Yes, you can find additional information about CVE-2020-10518 in the release notes of GitHub Enterprise Server versions 2.19.21, 2.20.15, and 2.21.6.
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