glsa-200504-01.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200504-01">
  <title>telnet-bsd: Multiple buffer overflows</title>
  <synopsis>
    The telnet-bsd telnet client is vulnerable to two buffer overflows, which
    could allow a malicious telnet server operator to execute arbitrary code.
  </synopsis>
  <product type="ebuild">telnet</product>
  <announced>2005-04-01</announced>
  <revised count="01">2005-04-01</revised>
  <bug>87019</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/telnet-bsd" auto="yes" arch="*">
      <unaffected range="ge">1.0-r1</unaffected>
      <vulnerable range="lt">1.0-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    telnet-bsd provides a command line telnet client which is used for
    remote login using the telnet protocol.
    </p>
  </background>
  <description>
    <p>
    A buffer overflow has been identified in the env_opt_add()
    function of telnet-bsd, where a response requiring excessive escaping
    can cause a heap-based buffer overflow. Another issue has been
    identified in the slc_add_reply() function, where a large number of SLC
    commands can overflow a fixed size buffer.
    </p>
  </description>
  <impact type="normal">
    <p>
    Successful exploitation would require a vulnerable user to connect
    to an attacker-controlled host using telnet, potentially executing
    arbitrary code with the permissions of the telnet user.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All telnet-bsd users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose "&gt;=net-misc/telnet-bsd-1.0-r1"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468">CAN-2005-0468</uri>
    <uri link="http://www.idefense.com/application/poi/display?id=221&amp;type=vulnerabilities">IDEF0867</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469">CAN-2005-0469</uri>
    <uri link="http://www.idefense.com/application/poi/display?id=220&amp;type=vulnerabilities">IDEF0866</uri>
  </references>
  <metadata tag="requester" timestamp="2005-03-29T16:15:13Z">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="2005-03-29T17:09:56Z">
    taviso
  </metadata>
  <metadata tag="bugReady" timestamp="2005-03-31T06:01:07Z">
    jaervosz
  </metadata>
</glsa>