GHSA-4vrq-3vrq-g6gg
BuildKit Git URL subdir component can cause access to restricted files
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/moby/buildkit | < 0.28.1 | 0.28.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
Insufficient validation of Git URL fragment subdir components (`<url>#<ref>:<subdir>`, [docs](https://docs.docker.com/build/concepts/context/#url-fragments)) may allow access to files outside the checked-out Git repository root. Possible access is limited to files on the same mounted filesystem.
### Patches
The issue has been fixed in version v0.28.1
### Workarounds
The issue affects only builds that use Git URLs with a subpath component. Avoid building Dockerfiles from untrusted sources or using the subdir component from an untrusted Git repository where the subdir component could point to a symlink.
References
External links from the advisory. They lead to third-party sites.