ffmpeg -- multiple vulnerabilities

NVD reports:

The decode_ihdr_chunk function in libavcodec/pngdec.c in
FFmpeg before 2.7.2 does not enforce uniqueness of the IHDR
(aka image header) chunk in a PNG image, which allows remote
attackers to cause a denial of service (out-of-bounds array
access) or possibly have unspecified other impact via a
crafted image with two or more of these chunks.

Multiple integer underflows in the ff_mjpeg_decode_frame
function in libavcodec/mjpegdec.c in FFmpeg before 2.7.2
allow remote attackers to cause a denial of service
(out-of-bounds array access) or possibly have unspecified
other impact via crafted MJPEG data.

The ff_sbr_apply function in libavcodec/aacsbr.c in
FFmpeg before 2.7.2 does not check for a matching AAC frame
syntax element before proceeding with Spectral Band
Replication calculations, which allows remote attackers to
cause a denial of service (out-of-bounds array access) or
possibly have unspecified other impact via crafted AAC
data.

The ff_mpv_common_init function in libavcodec/mpegvideo.c
in FFmpeg before 2.7.2 does not properly maintain the
encoding context, which allows remote attackers to cause a
denial of service (invalid pointer access) or possibly have
unspecified other impact via crafted MPEG data.

The destroy_buffers function in libavcodec/sanm.c in
FFmpeg before 2.7.2 does not properly maintain height and
width values in the video context, which allows remote
attackers to cause a denial of service (segmentation
violation and application crash) or possibly have
unspecified other impact via crafted LucasArts Smush video
data.

The allocate_buffers function in libavcodec/alac.c in
FFmpeg before 2.7.2 does not initialize certain context
data, which allows remote attackers to cause a denial of
service (segmentation violation) or possibly have
unspecified other impact via crafted Apple Lossless Audio
Codec (ALAC) data.

The sws_init_context function in libswscale/utils.c in
FFmpeg before 2.7.2 does not initialize certain pixbuf data
structures, which allows remote attackers to cause a denial
of service (segmentation violation) or possibly have
unspecified other impact via crafted video data.

The ff_frame_thread_init function in
libavcodec/pthread_frame.c in FFmpeg before 2.7.2 mishandles
certain memory-allocation failures, which allows remote
attackers to cause a denial of service (invalid pointer
access) or possibly have unspecified other impact via a
crafted file, as demonstrated by an AVI file.

The ff_rv34_decode_init_thread_copy function in
libavcodec/rv34.c in FFmpeg before 2.7.2 does not initialize
certain structure members, which allows remote attackers to
cause a denial of service (invalid pointer access) or
possibly have unspecified other impact via crafted (1) RV30
or (2) RV40 RealVideo data.