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-rwxr-xr-xyoutube_dl/YoutubeDL.py19
1 files changed, 12 insertions, 7 deletions
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index e8ce58604..ccad5f2ea 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1986,14 +1986,19 @@ class YoutubeDL(object):
https_handler = make_HTTPS_handler(self.params, debuglevel=debuglevel)
ydlh = YoutubeDLHandler(self.params, debuglevel=debuglevel)
data_handler = compat_urllib_request_DataHandler()
- unknown_handler = compat_urllib_request.UnknownHandler()
- handlers = (proxy_handler, https_handler, cookie_processor, ydlh, data_handler, unknown_handler)
- # we don't use build_opener because it automatically adds FileHandler,
- # which can be used for malicious purposes (see
+
+ # When passing our own FileHandler instance, build_opener won't add the
+ # default FileHandler and allows us to disable the file protocol, which
+ # can be used for malicious purposes (see
# https://github.com/rg3/youtube-dl/issues/8227)
- opener = compat_urllib_request.OpenerDirector()
- for handler in handlers:
- opener.add_handler(handler)
+ file_handler = compat_urllib_request.FileHandler()
+
+ def file_open(*args, **kwargs):
+ raise compat_urllib_error.URLError('file protocol is disabled')
+ file_handler.file_open = file_open
+
+ opener = compat_urllib_request.build_opener(
+ proxy_handler, https_handler, cookie_processor, ydlh, data_handler, file_handler)
# Delete the default user-agent header, which would otherwise apply in
# cases where our custom HTTP handler doesn't come into play