glsa-200611-05.xml


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

<glsa id="200611-05">
  <title>Netkit FTP Server: Privilege escalation</title>
  <synopsis>
    An incorrect seteuid() call could allow an FTP user to access some files or
    directories that would normally be inaccessible.
  </synopsis>
  <product type="ebuild">ftpd</product>
  <announced>November 10, 2006</announced>
  <revised>December 30, 2007: 02</revised>
  <bug>150292</bug>
  <access>remote</access>
  <affected>
    <package name="net-ftp/netkit-ftpd" auto="yes" arch="*">
      <unaffected range="ge">0.17-r4</unaffected>
      <vulnerable range="lt">0.17-r4</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    net-ftp/netkit-ftpd is the Linux Netkit FTP server with optional SSL support.
    </p>
  </background>
  <description>
    <p>
    Paul Szabo reported that an incorrect seteuid() call after the chdir()
    function can allow an attacker to access a normally forbidden
    directory, in some very particular circumstances, for example when the
    NFS-hosted targetted directory is not reachable by the client-side root
    user. Additionally, some potentially exploitable unchecked setuid()
    calls were also fixed.
    </p>
  </description>
  <impact type="high">
    <p>
    A local attacker might craft his home directory to gain access through
    ftpd to normally forbidden directories like /root, possibly with
    writing permissions if seteuid() fails and if the ftpd configuration
    allows that. The unchecked setuid() calls could also lead to a root FTP
    login, depending on the FTP server configuration.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Netkit FTP Server users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-ftp/netkit-ftpd-0.17-r4&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5778">CVE-2006-5778</uri>
  </references>
  <metadata tag="submitter" timestamp="Tue, 24 Oct 2006 15:02:54 +0000">
    falco
  </metadata>
  <metadata tag="bugReady" timestamp="Tue, 24 Oct 2006 15:03:34 +0000">
    falco
  </metadata>
</glsa>