Impact

The malicious user is able to update a crafted config file into repository's .git directory in combination with crafted file deletion to gain SSH access to the server. All installations with repository upload enabled (default) are affected.

Patches

File deletions are prohibited to repository's .git directory. Users should upgrade to 0.12.9 or the latest 0.13.0+dev.

Workarounds

N/A

References

https://huntr.dev/bounties/776e8f29-ff5e-4501-bb9f-0bd335007930/

For more information

If you have any questions or comments about this advisory, please post on #7000.

References

• GHSA-67mx-jc2f-jgjm
• gogs/gogs@38aff73
• https://github.com/gogs/gogs/blob/f36eeedbf89328ee70cc3a2e239f6314f9021f58/conf/app.ini#L127-L129
• https://huntr.dev/bounties/776e8f29-ff5e-4501-bb9f-0bd335007930/
• https://nvd.nist.gov/vuln/detail/CVE-2022-1986
• https://huntr.dev/bounties/776e8f29-ff5e-4501-bb9f-0bd335007930