[SECURITY] [DLA 644-1] libav security update

Package : libav
Version : 6:0.8.18-0+deb7u1
CVE ID : CVE-2015-1872 CVE-2015-5479 CVE-2016-7393

Multiple vulnerabilities have been found in libav:

CVE-2015-1872

The ff_mjpeg_decode_sof function in libavcodec/mjpegdec.c in Libav before
0.8.18 does not validate the number of components in a JPEG-LS Start Of
Frame segment, which allows remote attackers to cause a denial of service
(out-of-bounds array access) or possibly have unspecified other impact via
crafted Motion JPEG data.

CVE-2015-5479

The ff_h263_decode_mba function in libavcodec/ituh263dec.c in Libav before
11.5 allows remote attackers to cause a denial of service (divide-by-zero
error and application crash) via a file with crafted dimensions.

CVE-2016-7393

The aac_sync function in libavcodec/aac_parser.c in Libav before 11.5 is
vulnerable to a stack-based buffer overflow.

For Debian 7 "Wheezy", these problems have been fixed in version
6:0.8.18-0+deb7u1.

We recommend that you upgrade your libav packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS