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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200601-06">
<title>xine-lib, FFmpeg: Heap-based buffer overflow</title>
<synopsis>
xine-lib and FFmpeg are vulnerable to a buffer overflow that may be
exploited by attackers to execute arbitrary code.
</synopsis>
<product type="ebuild">xine-lib ffmpeg</product>
<announced>January 10, 2006</announced>
<revised>January 10, 2006: 01</revised>
<bug>115849</bug>
<bug>116181</bug>
<access>remote</access>
<affected>
<package name="media-libs/xine-lib" auto="yes" arch="*">
<unaffected range="ge">1.1.1-r3</unaffected>
<vulnerable range="lt">1.1.1-r3</vulnerable>
</package>
<package name="media-video/ffmpeg" auto="yes" arch="*">
<unaffected range="ge">0.4.9_p20051216</unaffected>
<vulnerable range="lt">0.4.9_p20051216</vulnerable>
</package>
</affected>
<background>
<p>
xine is a GPL high-performance, portable and reusable multimedia
playback engine. xine-lib is xine's core engine. FFmpeg is a very fast
video and audio converter and is used in xine-lib.
</p>
</background>
<description>
<p>
Simon Kilvington has reported a vulnerability in FFmpeg
libavcodec. The flaw is due to a buffer overflow error in the
"avcodec_default_get_buffer()" function. This function doesn't properly
handle specially crafted PNG files as a result of a heap overflow.
</p>
</description>
<impact type="normal">
<p>
A remote attacker could entice a user to run an FFmpeg based
application on a maliciously crafted PNG file, resulting in the
execution of arbitrary code with the permissions of the user running
the application.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All xine-lib users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=media-libs/xine-lib-1.1.1-r3&quot;</code>
<p>
All FFmpeg users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=media-video/ffmpeg-0.4.9_p20051216&quot;</code>
</resolution>
<references>
<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4048">CVE-2005-4048</uri>
<uri link="http://article.gmane.org/gmane.comp.video.ffmpeg.devel/26558">Original advisory</uri>
</references>
<metadata tag="requester" timestamp="Tue, 03 Jan 2006 10:30:55 +0000">
koon
</metadata>
<metadata tag="submitter" timestamp="Fri, 06 Jan 2006 00:22:43 +0000">
adir
</metadata>
<metadata tag="bugReady" timestamp="Mon, 09 Jan 2006 22:59:16 +0000">
DerCorny
</metadata>
</glsa>