glsa-200508-19.xml


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

<glsa id="200508-19">
  <title>lm_sensors: Insecure temporary file creation</title>
  <synopsis>
    lm_sensors is vulnerable to linking attacks, potentially allowing a local
    user to overwrite arbitrary files.
  </synopsis>
  <product type="ebuild">lm_sensors</product>
  <announced>August 30, 2005</announced>
  <revised>August 30, 2005: 01</revised>
  <bug>103568</bug>
  <access>local</access>
  <affected>
    <package name="sys-apps/lm_sensors" auto="yes" arch="*">
      <unaffected range="ge">2.9.1-r1</unaffected>
      <vulnerable range="lt">2.9.1-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    lm_sensors is a software package that provides drivers for
    monitoring the temperatures, voltages, and fans of Linux systems with
    hardware monitoring devices.
    </p>
  </background>
  <description>
    <p>
    Javier Fernandez-Sanguino Pena has discovered that lm_sensors
    insecurely creates temporary files with predictable filenames when
    saving configurations.
    </p>
  </description>
  <impact type="normal">
    <p>
    A local attacker could create symbolic links in the temporary file
    directory, pointing to a valid file somewhere on the filesystem. When
    the pwmconfig script of lm_sensors is executed, this would result in
    the file being overwritten with the rights of the user running the
    script, which typically is the root user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All lm_sensors users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=sys-apps/lm_sensors-2.9.1-r1&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2672">CAN-2005-2672</uri>
  </references>
  <metadata tag="requester" timestamp="Sat, 27 Aug 2005 09:37:19 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Sat, 27 Aug 2005 09:38:55 +0000">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="Sat, 27 Aug 2005 22:28:16 +0000">
    formula7
  </metadata>
</glsa>