glsa-200501-24.xml


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

<glsa id="200501-24">
  <title>tnftp: Arbitrary file overwriting</title>
  <synopsis>
    tnftp fails to validate filenames when downloading files, making it
    vulnerable to arbitrary file overwriting.
  </synopsis>
  <product type="ebuild">tnftp</product>
  <announced>January 14, 2005</announced>
  <revised>January 14, 2005: 01</revised>
  <bug>74704</bug>
  <access>remote</access>
  <affected>
    <package name="net-ftp/tnftp" auto="yes" arch="*">
      <unaffected range="ge">20050103</unaffected>
      <vulnerable range="lt">20050103</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    tnftp is a NetBSD FTP client with several advanced features.
    </p>
  </background>
  <description>
    <p>
    The 'mget' function in cmds.c lacks validation of the filenames
    that are supplied by the server.
    </p>
  </description>
  <impact type="normal">
    <p>
    An attacker running an FTP server could supply clients with
    malicious filenames, potentially allowing the overwriting of arbitrary
    files with the permission of the connected user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All tnftp users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-ftp/tnftp-20050103&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1294">CAN-2004-1294</uri>
    <uri link="http://tigger.uic.edu/~jlongs2/holes/tnftp.txt">Original Advisory</uri>
  </references>
  <metadata tag="requester" timestamp="Mon, 10 Jan 2005 09:24:54 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Tue, 11 Jan 2005 21:44:41 +0000">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="Wed, 12 Jan 2005 23:35:57 +0000">
    lewk
  </metadata>
</glsa>