CVE-2021-22870 Path traversal in GitHub Enterprise Server hosted Pages leads to unauthorized file read access
An attacker with site creation permissions can read system files via path traversal in GitHub Pages builds on GitHub Enterprise Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-22870?
CVE-2021-22870 is a medium-severity path traversal vulnerability in Github Enterprise Server, published on 10 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A path traversal vulnerability was identified in GitHub Pages builds on GitHub Enterprise Server that could allow an attacker to read system files. 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 3.3 and was fixed in versions 3.0.19, 3.1.11, and 3.2.3. This vulnerability was reported via the GitHub Bug Bounty program.
Which versions are affected by CVE-2021-22870?
It affects 1 product.
Products include Github Enterprise Server.
How do I fix CVE-2021-22870?
No fix has been published for CVE-2021-22870 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-22870 being exploited?
There is no known exploitation of CVE-2021-22870 in the wild and no public exploit code.
Other vulnerabilities in Github Enterprise Server
- CVE-2024-4985 Auth bypass in Enterprise Server
- CVE-2022-23739 Missing authorization in GitHub Enterprise Server
- CVE-2022-46255 Improper Limitation of a Pathname to a Restricted Directory in GitHub Enterprise Server leading to RCE
- CVE-2021-22869 Improper access control in GitHub Enterprise Server allows self-hosted runners to execute outside their control group
- CVE-2024-9487 Auth bypass in Enterprise Server
Sources
Also known as GHSA-5h6r-gfff-2wjp.