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<define-tag description>LTS security update</define-tag>
<define-tag moreinfo>
<p>Two more security issues have been corrected in the libav multimedia library. This is a follow-up announcement for DLA-1611-1.</p>
<ul>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2015-6823">CVE-2015-6823</a>
<p>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().</p>
<p>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.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2015-6824">CVE-2015-6824</a>
<p>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.</p>
<p>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.</p></li>
</ul>
<p>For Debian 8 <q>Jessie</q>, these problems have been fixed in version
6:11.12-1~deb8u3.</p>
<p>We recommend that you upgrade your libav packages.</p>
<p>Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <a href="https://wiki.debian.org/LTS">https://wiki.debian.org/LTS</a></p>
</define-tag>
# do not modify the following line
#include "$(ENGLISHDIR)/lts/security/2018/dla-1611-2.data"
# $Id: $
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