glsa-200410-24.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200410-24">
  <title>MIT krb5: Insecure temporary file use in send-pr.sh</title>
  <synopsis>
    The send-pr.sh script, included in the mit-krb5 package, is vulnerable to
    symlink attacks, potentially allowing a local user to overwrite arbitrary
    files with the rights of the user running the utility.
  </synopsis>
  <product type="ebuild">mit-krb5</product>
  <announced>2004-10-25</announced>
  <revised count="02">2005-01-30</revised>
  <bug>66359</bug>
  <access>local</access>
  <affected>
    <package name="app-crypt/mit-krb5" auto="yes" arch="*">
      <unaffected range="ge">1.3.5-r1</unaffected>
      <unaffected range="rge">1.3.4-r1</unaffected>
      <vulnerable range="le">1.3.5</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    MIT krb5 is the free implementation of the Kerberos network
    authentication protocol written by the Massachusetts Institute of
    Technology.
    </p>
  </background>
  <description>
    <p>
    The send-pr.sh script creates temporary files in world-writeable
    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
    send-pr.sh is called, 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 MIT krb5 users should upgrade to the latest version:
    </p>
    <code>
    # emerge sync
    
    # emerge -pv "&gt;=app-crypt/mit-krb5-1.3.4-r1"
    # emerge "&gt;=app-crypt/mit-krb5-1.3.4-r1"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0971">CAN-2004-0971</uri>
  </references>
  <metadata tag="submitter" timestamp="2004-10-19T17:38:41Z">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="2004-10-25T13:03:38Z">
    koon
  </metadata>
</glsa>