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Fix directory traversal in the HlsSegmentController in a fairly rudimentary but working way.

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GHSL-2021-050: Issue 1,2,3 Arbitrary file read and directory traversal.
The segment id's can probably just be verified to be an actual ID or to not contain any forward or backward slashes
This commit is contained in:
Erwin de Haan 2021-03-20 00:38:58 +01:00
parent 9360fecb31
commit f61d18612b
1 changed files with 20 additions and 0 deletions
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20
Jellyfin.Api/Controllers/HlsSegmentController.cs
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@ -62,6 +62,13 @@ namespace Jellyfin.Api.Controllers
// TODO: Deprecate with new iOS app
var file = segmentId + Path.GetExtension(Request.Path);
file = Path.Combine(_serverConfigurationManager.GetTranscodePath(), file);
var transcodePath = _serverConfigurationManager.GetTranscodePath();
file = Path.GetFullPath(Path.Combine(transcodePath, file));
var fileDir = Path.GetDirectoryName(file);
if (string.IsNullOrEmpty(fileDir) || !fileDir.StartsWith(transcodePath))
{
return BadRequest("Invalid segment.");
}
return FileStreamResponseHelpers.GetStaticFileResult(file, MimeTypes.GetMimeType(file)!, false, HttpContext);
}
@ -82,6 +89,13 @@ namespace Jellyfin.Api.Controllers
{
var file = playlistId + Path.GetExtension(Request.Path);
file = Path.Combine(_serverConfigurationManager.GetTranscodePath(), file);
var transcodePath = _serverConfigurationManager.GetTranscodePath();
file = Path.GetFullPath(Path.Combine(transcodePath, file));
var fileDir = Path.GetDirectoryName(file);
if (string.IsNullOrEmpty(fileDir) || !fileDir.StartsWith(transcodePath) || Path.GetExtension(file) != ".m3u8")
{
return BadRequest("Invalid segment.");
}
return GetFileResult(file, file);
}
@ -131,6 +145,12 @@ namespace Jellyfin.Api.Controllers
var transcodeFolderPath = _serverConfigurationManager.GetTranscodePath();
file = Path.Combine(transcodeFolderPath, file);
file = Path.GetFullPath(Path.Combine(transcodeFolderPath, file));
var fileDir = Path.GetDirectoryName(file);
if (string.IsNullOrEmpty(fileDir) || !fileDir.StartsWith(transcodeFolderPath))
{
return BadRequest("Invalid segment.");
}
var normalizedPlaylistId = playlistId;