gentoo-overlay/metadata/glsa/glsa-200806-07.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200806-07">
  <title>X.Org X server: Multiple vulnerabilities</title>
  <synopsis>
    Multiple vulnerabilities have been discovered in the X.Org X server,
    possibly allowing for the remote execution of arbitrary code with root
    privileges.
  </synopsis>
  <product type="ebuild">xorg-server</product>
  <announced>2008-06-19</announced>
  <revised count="01">2008-06-19</revised>
  <bug>225419</bug>
  <access>remote, local</access>
  <affected>
    <package name="x11-base/xorg-server" auto="yes" arch="*">
      <unaffected range="ge">1.3.0.0-r6</unaffected>
      <vulnerable range="lt">1.3.0.0-r6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    The X Window System is a graphical windowing system based on a
    client/server model.
    </p>
  </background>
  <description>
    <p>
    Regenrecht reported multiple vulnerabilities in various X server
    extensions via iDefense:
    </p>
    <ul>
    <li>The
    SProcSecurityGenerateAuthorization() and SProcRecordCreateContext()
    functions of the RECORD and Security extensions are lacking proper
    parameter validation (CVE-2008-1377).</li>
    <li>An integer overflow is
    possible in the function ShmPutImage() of the MIT-SHM extension
    (CVE-2008-1379).</li>
    <li>The RENDER extension contains several
    possible integer overflows in the AllocateGlyph() function
    (CVE-2008-2360) which could possibly lead to a heap-based buffer
    overflow. Further possible integer overflows have been found in the
    ProcRenderCreateCursor() function (CVE-2008-2361) as well as in the
    SProcRenderCreateLinearGradient(), SProcRenderCreateRadialGradient()
    and SProcRenderCreateConicalGradient() functions (CVE-2008-2362).</li>
    </ul>
  </description>
  <impact type="high">
    <p>
    Exploitation of these vulnerabilities could possibly lead to the remote
    execution of arbitrary code with root privileges, if the server is
    running as root, which is the default. It is also possible to crash the
    server by making use of these vulnerabilities.
    </p>
  </impact>
  <workaround>
    <p>
    It is possible to avoid these vulnerabilities by disabling the affected
    server extensions. Therefore edit the configuration file
    (/etc/X11/xorg.conf) to contain the following in the appropriate
    places:
    </p>
    <code>
      Section "Extensions"   
    	Option "MIT-SHM" "disable"
    	Option "RENDER" "disable" 
    	Option "SECURITY" "disable"
      EndSection
    
      Section "Module"
       Disable "record"
      EndSection</code>
  </workaround>
  <resolution>
    <p>
    All X.org X Server users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=x11-base/xorg-server-1.3.0.0-r6"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1377">CVE-2008-1377</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1379">CVE-2008-1379</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2360">CVE-2008-2360</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2361">CVE-2008-2361</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2362">CVE-2008-2362</uri>
  </references>
  <metadata tag="submitter" timestamp="2008-06-11T10:16:02Z">
    vorlon
  </metadata>
  <metadata tag="bugReady" timestamp="2008-06-16T08:09:32Z">
    vorlon
  </metadata>
</glsa>