vulnerability / NVI-00016422 / Revision 1
OpenList: Authenticated arbitrary file write via Content-Disposition path traversal in SimpleHttp offline-download tool
GitHub lists this reviewed advisory for github.com/OpenListTeam/OpenList. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
6.5 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/OpenListTeam/OpenList
source listed<= 4.2.2
### Summary Alist's offline-download feature (`POST /api/fs/add_offline_download` with `tool: "SimpleHttp"`) accepts an attacker-supplied URL, fetches it, and saves the bytes under a per-task temp directory before transferring to the user's destination storage. The temp filename is taken from the response's `Content-Disposition` header (attacker-controlled when the URL points to an attacker HTTP server), passed verbatim to `filepath.Join(tempDir, filename)`, and written via `os.Create` with no containment check. Go's `filepath.Join` calls `Clean` on the result, which collapses `..` segments and lets the attacker traverse out of `tempDir` to write any file the alist process can write. A non-admin user with `PermAddOfflineDownload` permission on any path is sufficient. ### Affected code `internal/offline_download/http/util.go` — filename returned verbatim from header: ```go func parseFilenameFromContentDisposition(contentDisposition string) (string, error) { if contentDisposition == "" { return "", fmt.Errorf("Content-Disposition is empty") } _, params, err := mime.ParseMediaType(contentDisposition) if err != nil { return "", err } filenam
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-h6cj-26g5-67fv ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.