glsa-200701-25.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200701-25">
  <title>X.Org X server: Multiple vulnerabilities</title>
  <synopsis>
    Sean Larsson from iDefense Labs has found multiple vulnerabilities in the
    DBE and Render extensions.
  </synopsis>
  <product type="ebuild">X.Org</product>
  <announced>January 27, 2007</announced>
  <revised>February 26, 2007: 02</revised>
  <bug>157421</bug>
  <access>local</access>
  <affected>
    <package name="x11-base/xorg-server" auto="yes" arch="*">
      <unaffected range="ge">1.1.1-r4</unaffected>
      <vulnerable range="lt">1.1.1-r4</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    The X Window System is a graphical windowing system based on a
    client/server model.
    </p>
  </background>
  <description>
    <p>
    Multiple memory corruption vulnerabilities have been found in the
    ProcDbeGetVisualInfo() and the ProcDbeSwapBuffers() of the DBE
    extension, and ProcRenderAddGlyphs() in the Render extension.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could execute arbitrary code with the privileges of
    the user running the X server, typically root.
    </p>
  </impact>
  <workaround>
    <p>
    Disable the DBE extension by removing the "Load dbe" directive in the
    Module section of xorg.conf, and explicitly disable the Render
    extension with ' Option "RENDER" "disable" ' in the Extensions section.
    </p>
    <p>
    Note: This could affect the functionality of some applications.
    </p>
  </workaround>
  <resolution>
    <p>
    All X.Org X server users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=x11-base/xorg-server-1.1.1-r4&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6101">CVE-2006-6101</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6102">CVE-2006-6102</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6103">CVE-2006-6103</uri>
  </references>
  <metadata tag="submitter" timestamp="Tue, 23 Jan 2007 12:31:17 +0000">
    daxomatic
  </metadata>
  <metadata tag="bugReady" timestamp="Wed, 24 Jan 2007 15:54:52 +0000">
    vorlon
  </metadata>
</glsa>