glsa-200405-09.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="200405-09">
  <title>ProFTPD Access Control List bypass vulnerability</title>
  <synopsis>
    Version 1.2.9 of ProFTPD introduced a vulnerability that causes CIDR-based
    Access Control Lists (ACLs) to be treated as &quot;AllowAll&quot;, thereby
    allowing remote users full access to files available to the FTP daemon.
  </synopsis>
  <product type="ebuild">proftpd</product>
  <announced>May 19, 2004</announced>
  <revised>May 19, 2004: 01</revised>
  <bug>49496</bug>
  <access>remote </access>
  <affected>
    <package name="net-ftp/proftpd" auto="yes" arch="*">
      <unaffected range="ge">1.2.9-r2</unaffected>
      <vulnerable range="eq">1.2.9-r1</vulnerable>
      <vulnerable range="eq">1.2.9</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    ProFTPD is an FTP daemon.
    </p>
  </background>
  <description>
    <p>
    ProFTPD 1.2.9 introduced a vulnerability that allows CIDR-based ACLs (such
    as 10.0.0.1/24) to be bypassed. The CIDR ACLs are disregarded, with the net
    effect being similar to an "AllowAll" directive.
    </p>
  </description>
  <impact type="high">
    <p>
    This vulnerability may allow unauthorized files, including critical system
    files to be downloaded and/or modified, thereby allowing a potential remote
    compromise of the server.
    </p>
  </impact>
  <workaround>
    <p>
    Users may work around the problem by avoiding use of CIDR-based ACLs.
    </p>
  </workaround>
  <resolution>
    <p>
    ProFTPD users are encouraged to upgrade to the latest version of the
    package:
    </p>
    <code>
    # emerge sync

    # emerge -pv ">=net-ftp/proftpd-1.2.9-r2"
    # emerge ">=net-ftp/proftpd-1.2.9-r2"</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0432">CAN-2004-0432</uri>
  </references>
  <metadata tag="submitter">
    klieber
  </metadata>
</glsa>