<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201101-03">
  <title>libvpx: User-assisted execution of arbitrary code</title>
  <synopsis>
    Timothy B. Terriberry discovered that libvpx contains an integer overflow
    vulnerability in the processing of video streams that may allow
    user-assisted execution of arbitrary code.
  </synopsis>
  <product type="ebuild">libvpx</product>
  <announced>2011-01-15</announced>
  <revised count="01">2011-01-15</revised>
  <bug>345559</bug>
  <access>remote</access>
  <affected>
    <package name="media-libs/libvpx" auto="yes" arch="*">
      <unaffected range="ge">0.9.5</unaffected>
      <vulnerable range="lt">0.9.5</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    libvpx is the VP8 codec SDK used to encode and decode video streams,
    typically within a WebM format media file.
    </p>
  </background>
  <description>
    <p>
    libvpx is vulnerable to an integer overflow vulnerability when
    processing crafted VP8 video streams.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could entice a user to open a specially crafted media
    file, possibly resulting in the execution of arbitrary code with the
    privileges of the user running the application, or a Denial of Service.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All libvpx users should upgrade to the latest stable version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=media-libs/libvpx-0.9.5"</code>
    <p>
    Packages which depend on this library may need to be recompiled. Tools
    such as revdep-rebuild may assist in identifying some of these
    packages.
    </p>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4203">CVE-2010-4203</uri>
  </references>
  <metadata tag="requester" timestamp="2010-12-13T01:15:02Z">
    underling
  </metadata>
  <metadata tag="submitter" timestamp="2011-01-05T05:26:31Z">
    underling
  </metadata>
  <metadata tag="bugReady" timestamp="2011-01-07T16:42:00Z">
    underling
  </metadata>
</glsa>
