## Problem
The repository restorer (`services/migrations/restore.go`) builds
`file://` URLs for release attachments and PR patches by joining
user-supplied paths from `release.yml` and `pull_request.yml` onto the
dump directory:
```go
*asset.DownloadURL = "file://" + filepath.Join(r.baseDir, *asset.DownloadURL)
pr.PatchURL = "file://" + filepath.Join(r.baseDir, pr.PatchURL)
```
`filepath.Join` cleans the path, so a crafted relative value such as
`../../../../etc/passwd` resolves to an absolute path **outside** the
dump directory. `uri.Open` then reads it via `os.Open` and stores the
content as a release attachment, which is retrievable through the API —
an arbitrary file read (Local File Inclusion) from a dump archive
supplied to `restore-repo`.
## Fix
Add a `localFileURL` helper that resolves the relative path against
`baseDir` and rejects anything that escapes it. Malicious entries are
skipped with a warning so a legitimate restore still completes; in-dump
files keep working unchanged.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Giteabot