glsa-200512-18.xml


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

<glsa id="200512-18">
  <title>XnView: Privilege escalation</title>
  <synopsis>
    XnView may search for shared libraries in an untrusted location,
    potentially allowing local users to execute arbitrary code with the
    privileges of another user.
  </synopsis>
  <product type="ebuild">xnview</product>
  <announced>December 30, 2005</announced>
  <revised>May 22, 2006: 02</revised>
  <bug>117063</bug>
  <access>local</access>
  <affected>
    <package name="x11-misc/xnview" auto="yes" arch="x86">
      <unaffected range="ge">1.70-r1</unaffected>
      <vulnerable range="lt">1.70-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    XnView is an efficient multimedia viewer, browser and converter,
    distributed free for non-commercial use.
    </p>
  </background>
  <description>
    <p>
    Krzysiek Pawlik of Gentoo Linux discovered that the XnView package for
    IA32 used the DT_RPATH field insecurely, causing the dynamic loader to
    search for shared libraries in potentially untrusted directories.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could create a malicious shared object that would be
    loaded and executed when a user attempted to use an XnView utility.
    This would allow a malicious user to effectively hijack XnView and
    execute arbitrary code with the privileges of the user running the
    program.
    </p>
  </impact>
  <workaround>
    <p>
    The system administrator may use the chrpath utility to remove the
    DT_RPATH field from the XnView utilities:
    </p>
    <code>
    # emerge app-admin/chrpath
    # chrpath --delete /opt/bin/nconvert /opt/bin/nview /opt/bin/xnview</code>
  </workaround>
  <resolution>
    <p>
    All XnView users on the x86 platform should upgrade to the latest
    version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=x11-misc/xnview-1.70-r1&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4595">CVE-2005-4595</uri>
  </references>
  <metadata tag="submitter" timestamp="Thu, 29 Dec 2005 17:05:23 +0000">
    taviso
  </metadata>
  <metadata tag="bugReady" timestamp="Fri, 30 Dec 2005 12:33:06 +0000">
    koon
  </metadata>
</glsa>