[vlc-devel] [PATCH] M3u & pls demux: Check the size of each file line to prevent flooding the playlist.

Adrien Maglo magsoft at videolan.org
Wed Apr 24 13:09:44 CEST 2013


The exploit attached to the ticket #7361 shows that it is possible to 
freeze VLC with a corrupted playlist file containing very long lines.
VLC indeed outputs to the logs a message giving the name of the media, 
which is extremely long. This is not a security issue but as logging is 
a costly operation, outputting this message takes a lot of time and 
freezes VLC.

The attached patch proposes to set a maximum line length for the M3U and 
PLS playlist format. It therefore prevent the playlist from being 
flooded using these demux.

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