Gogs has an argument Injection in the built-in SSH server
### Impact When the built-in SSH server is enabled (`[server] START_SSH_SERVER = true`), unprivileged user accounts with at least one SSH key can execute arbitrary commands on the Gogs instance with the privileges of the user specified by `RUN_USER` in the configuration. It allows attackers to access and alter any users' code hosted on the same instance. ### Patches The `env` command sent to the internal SSH server has been changed to be a passthrough (https://github.com/gogs/gogs/pull/7868), i.e. the feature is effectively removed. Users should upgrade to 0.13.1 or the latest 0.14.0+dev. ### Workarounds [Disable the use of built-in SSH server](https://github.com/gogs/gogs/blob/7adac94f1e93cc5c3545ea31688662dcef9cd737/conf/app.ini#L76-L77) on operating systems other than Windows. ### References https://www.cve.org/CVERecord?id=CVE-2024-39930
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-39930US | critical9.9 | Exploit | ||
The built-in SSH server of Gogs through 0.13.0 allows argument injection in internal/ssh/ssh.go, leading to remote code execution. Authenticated attackers can exploit this by openi… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/gogs/gogsPACKAGE
- https://github.com/gogs/gogs/security/advisories/GHSA-vm62-9jw3-c8w3WEB
- https://www.sonarsource.com/blog/securing-developer-tools-unpatched-code-vulnerabilities-in-gogs-1WEB
- https://www.vicarius.io/vsociety/posts/argument-injection-in-gogs-ssh-server-cve-2024-39930WEB
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