In short
- CVE-2021-32546 is a HIGH (CVSS 8.8) vulnerability affecting gogs.io/gogs, gogs (gogs).
- Chance of exploitation in the next 30 days (EPSS): 2.2%, higher than 82.5% of all vulnerabilities.
- Fix: update to 0.12.8 or later.
| Package | Affected versions | Patched versions |
|---|
| gogs.io/gogs Go | < 0.12.8
| 0.12.8
|
| gogs | < 0.12.8
| 0.12.8
|
Description
Impact
The malicious user is able to update a crafted config file into repository's .git directory with to gain SSH access to the server. All installations with repository upload enabled (default) are affected.
Patches
Repository file updates are prohibited to its .git directory. Users should upgrade to 0.12.8 or the latest 0.13.0+dev.
Workarounds
N/A
References
N/A
For more information
If you have any questions or comments about this advisory, please post on #6555.
NVD description
Missing input validation in internal/db/repo_editor.go in Gogs before 0.12.8 allows an attacker to execute code remotely. An unprivileged attacker (registered user) can overwrite the Git configuration in his repository. This leads to Remote Command Execution, because that configuration can contain an option such as sshCommand, which is executed when a master branch is a remote branch (using an ssh:// URI). The remote branch can also be configured by editing the Git configuration file. One can create a new file in a new repository, using the GUI, with "\" as its name, and then rename this file to .git/config with the custom configuration content (and then save it).
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