metadata/glsa/glsa-200412-04.xml


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

<glsa id="200412-04">
  <title>Perl: Insecure temporary file creation</title>
  <synopsis>
    Perl is vulnerable to symlink attacks, potentially allowing a local user to
    overwrite arbitrary files.
  </synopsis>
  <product type="ebuild">perl</product>
  <announced>December 07, 2004</announced>
  <revised>December 07, 2004: 01</revised>
  <bug>66360</bug>
  <access>local</access>
  <affected>
    <package name="dev-lang/perl" auto="yes" arch="*">
      <unaffected range="rge">5.8.5-r2</unaffected>
      <unaffected range="ge">5.8.6-r1</unaffected>
      <vulnerable range="lt">5.8.5-r2</vulnerable>
      <vulnerable range="eq">5.8.6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Perl is a stable, cross-platform programming language created by
    Larry Wall.
    </p>
  </background>
  <description>
    <p>
    Some Perl modules create temporary files in world-writable
    directories with predictable names.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could create symbolic links in the temporary
    files directory, pointing to a valid file somewhere on the filesystem.
    When a Perl script is executed, this would result in the file being
    overwritten with the rights of the user running the utility, which
    could be the root user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Perl users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=perl-5.8.5-r2&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0976">CAN-2004-0976</uri>
    <uri link="http://www.trustix.org/errata/2004/0050/">Trustix Advisory #2004-0050</uri>
  </references>
  <metadata tag="submitter" timestamp="Sun,  5 Dec 2004 01:07:23 +0000">
    lewk
  </metadata>
  <metadata tag="bugReady" timestamp="Mon,  6 Dec 2004 21:18:17 +0000">
    lewk
  </metadata>
</glsa>