[SECURITY] [DLA 1611-2] libav security update

Package : libav
Version : 6:11.12-1~deb8u3
CVE ID : CVE-2015-6822 CVE-2015-6823 CVE-2015-6824

Two more security issues have been corrected in the libav multimedia library. This is a follow-up announcement for DLA-1611-1.

CVE-2015-6823

The allocate_buffers function in libavcodec/alac.c did not initialize
certain context data, which allowed remote attackers to cause a
denial of service (segmentation violation) or possibly have
unspecified other impact via crafted Apple Lossless Audio Codec
(ALAC) data. This issues has now been addressed by clearing pointers
in avcodec/alac.c's allocate_buffers().

Other than stated in debian/changelog of upload 6:11.12-1~deb8u2,
this issue only now got fixed with upload of 6:11.12-1~deb8u3.

CVE-2015-6824

The sws_init_context function in libswscale/utils.c did not
initialize certain pixbuf data structures, which allowed remote
attackers to cause a denial of service (segmentation violation) or
possibly have unspecified other impact via crafted video data. In
swscale/utils.c now these pix buffers get cleared which fixes use of
uninitialized memory.

Other than stated in debian/changelog of upload 6:11.12-1~deb8u2,
this issue only now got fixed with upload of 6:11.12-1~deb8u3.

For Debian 8 "Jessie", these problems have been fixed in version
6:11.12-1~deb8u3.

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

–

mike gabriel aka sunweaver (Debian Developer)
fon: +49 (1520) 1976 148

GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31
mail: [email protected], http://sunweavers.net

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