*** This bug is a security vulnerability ***

Public security bug reported:

FFmpeg 2.7.6 fixing a number of crashes and other potentially security
relevant issues (including CVE-2016-2213) was released.

>From the upstream Changelog:

version 2.7.6
- avcodec/jpeg2000dec: More completely check cdef
- avutil/opt: check for and handle errors in av_opt_set_dict2()
- avcodec/flacenc: fix calculation of bits required in case of custom sample 
rate
- avformat: Document urls a bit
- avformat/libquvi: Set default demuxer and protocol limitations
- avformat/concat: Check protocol prefix
- doc/demuxers: Document enable_drefs and use_absolute_path
- avcodec/mjpegdec: Check for end for both bytes in unescaping
- avcodec/mpegvideo_enc: Check for integer overflow in 
ff_mpv_reallocate_putbitbuffer()
- avformat/avformat: Replace some references to filenames by urls
- avcodec/wmaenc: Check ff_wma_init() for failure
- avcodec/mpeg12enc: Move high resolution thread check to before initializing 
threads
- avformat/img2dec: Use AVOpenCallback
- avformat/avio: Limit url option parsing to the documented cases
- avformat/img2dec: do not interpret the filename by default if a IO context 
has been opened
- avcodec/ass_split: Fix null pointer dereference in ff_ass_style_get()
- mov: Add an option to toggle dref opening
- avcodec/gif: Fix lzw buffer size
- avcodec/put_bits: Assert buf_ptr in flush_put_bits()
- avcodec/tiff: Check subsample & rps values more completely
- swscale/swscale: Add some sanity checks for srcSlice* parameters
- swscale/x86/rgb2rgb_template: Fix planar2x() for short width
- swscale/swscale_unscaled: Fix odd height inputs for bayer_to_yv12_wrapper()
- swscale/swscale_unscaled: Fix odd height inputs for bayer_to_rgb24_wrapper()
- avcodec/aacenc: Check both channels for finiteness
- swscale/swscale-test: Fix slice height in random reference data creation.
- dca: fix misaligned access in avpriv_dca_convert_bitstream
- brstm: fix missing closing brace
- brstm: also allocate b->table in read_packet
- brstm: make sure an ADPC chunk was read for adpcm_thp
- vorbisdec: reject rangebits 0 with non-0 partitions
- vorbisdec: reject channel mapping with less than two channels
- ffmdec: reset packet_end in case of failure
- avformat/ipmovie: put video decoding_map_size into packet and use it in 
decoder

** Affects: ffmpeg (Ubuntu)
     Importance: Undecided
         Status: New

** Information type changed from Private Security to Public Security

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https://bugs.launchpad.net/bugs/1541622

Title:
   FFmpeg security fixes February 2016

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