glsa-201207-04.xml


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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="201207-04">
  <title>X.Org X Server: Privilege escalation</title>
  <synopsis>A format string vulnerability in X.Org X Server may allow local
    privilege escalation or Denial of Service.
  </synopsis>
  <product type="ebuild">xorg-server</product>
  <announced>2012-07-09</announced>
  <revised count="1">2012-07-09</revised>
  <bug>412609</bug>
  <access>local</access>
  <affected>
    <package name="x11-base/xorg-server" auto="yes" arch="*">
      <unaffected range="ge">1.11.4-r1</unaffected>
      <unaffected range="rge">1.10.6-r1</unaffected>
      <unaffected range="rle">1.9.5-r1</unaffected>
      <vulnerable range="lt">1.11.4-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>The X Window System is a graphical windowing system based on a
      client/server model.
    </p>
  </background>
  <description>
    <p>The "LogVHdrMessageVerb()" function in log.c contains a format string
      vulnerability.
    </p>
    
    <p>NOTE: Exposure to this vulnerability is reduced in Gentoo due to X.Org X
      Server being built with "-D_FORTIFY_SOURCE=2" by default.
    </p>
  </description>
  <impact type="high">
    <p>A local attacker could gain escalated privileges or cause a Denial of
      Service condition.
    </p>
  </impact>
  <workaround>
    <p>There is no known workaround at this time.</p>
  </workaround>
  <resolution>
    <p>All X.Org X Server 1.11.x users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=x11-base/xorg-server-1.11.4-r1"
    </code>
    
    <p>All X.Org X Server 1.10.x users should upgrade to the latest version:</p>
    
    <code>
      # emerge --sync
      # emerge --ask --oneshot --verbose "&gt;=x11-base/xorg-server-1.10.6-r1"
    </code>
    
    <p>X.Org X Server 1.9.x is not affected.</p>
  </resolution>
  <references>
    <uri link="https://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2118">CVE-2012-2118</uri>
  </references>
  <metadata timestamp="2012-06-02T13:03:57Z" tag="requester">ackle</metadata>
  <metadata timestamp="2012-07-09T22:21:08Z" tag="submitter">ackle</metadata>
</glsa>