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

2018-12-21T06:20:02
ID DEBIAN:DLA-1611-2:6D948
Type debian
Reporter Debian
Modified 2018-12-21T06:20:02

Description

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

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