glsa-200409-08.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200409-08">
  <title>Ruby: CGI::Session creates files insecurely</title>
  <synopsis>
    When used for CGI scripting, Ruby creates session files in /tmp with the
    permissions of the default umask. Depending on that umask, local users may
    be able to read sensitive data stored in session files.
  </synopsis>
  <product type="ebuild">dev-lang/ruby</product>
  <announced>2004-09-03</announced>
  <revised count="01">2004-09-03</revised>
  <bug>60525</bug>
  <access>local</access>
  <affected>
    <package name="dev-lang/ruby" auto="yes" arch="*">
      <unaffected range="rge">1.6.8-r11</unaffected>
      <unaffected range="rge">1.8.0-r7</unaffected>
      <unaffected range="ge">1.8.2_pre2</unaffected>
      <vulnerable range="lt">1.8.2_pre2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Ruby is an Object Oriented, interpreted scripting language used for many
    system scripting tasks. It can also be used for CGI web applications.
    </p>
  </background>
  <description>
    <p>
    The CGI::Session::FileStore implementation (and presumably
    CGI::Session::PStore), which allow data associated with a particular
    Session instance to be written to a file, writes to a file in /tmp with no
    regard for secure permissions. As a result, the file is left with whatever
    the default umask permissions are, which commonly would allow other local
    users to read the data from that session file.
    </p>
  </description>
  <impact type="normal">
    <p>
    Depending on the default umask, any data stored using these methods could
    be read by other users on the system.
    </p>
  </impact>
  <workaround>
    <p>
    By changing the default umask on the system to not permit read access to
    other users (e.g. 0700), one can prevent these files from being readable by
    other users.
    </p>
  </workaround>
  <resolution>
    <p>
    All Ruby users should upgrade to the latest version:
    </p>
    <code>
    # emerge sync

    # emerge -pv "&gt;=dev-lang/ruby-your_version"
    # emerge "&gt;=dev-lang/ruby-your_version"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0755">CAN-2004-0755</uri>
  </references>
  <metadata tag="requester" timestamp="2004-08-28T23:01:05Z">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="2004-09-01T04:27:07Z">
    dmargoli
  </metadata>
</glsa>