glsa-200408-04.xml


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

<glsa id="200408-04">
  <title>PuTTY: Pre-authentication arbitrary code execution</title>
  <synopsis>
    PuTTY contains a vulnerability allowing a SSH server to execute arbitrary
    code on the connecting client.
  </synopsis>
  <product type="ebuild">PuTTY</product>
  <announced>August 05, 2004</announced>
  <revised>May 22, 2006: 03</revised>
  <bug>59383</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/putty" auto="yes" arch="*">
      <unaffected range="ge">0.55</unaffected>
      <vulnerable range="le">0.54</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    PuTTY is a free implementation of Telnet and SSH for Win32 and Unix
    platforms, along with an xterm terminal emulator.
    </p>
  </background>
  <description>
    <p>
    PuTTY contains a vulnerability allowing a malicious server to execute
    arbitrary code on the connecting client before host key verification.
    </p>
  </description>
  <impact type="normal">
    <p>
    When connecting to a server using the SSH2 protocol an attacker is able
    to execute arbitrary code with the permissions of the user running
    PuTTY by sending specially crafted packets to the client during the
    authentication process but before host key verification.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time. All users are encouraged to
    upgrade to the latest available version of PuTTY.
    </p>
  </workaround>
  <resolution>
    <p>
    All PuTTY users should upgrade to the latest version:
    </p>
    <code>
    # emerge sync
    
    # emerge -pv &quot;&gt;=net-misc/putty-0.55&quot;
    # emerge &quot;&gt;=net-misc/putty-0.55&quot;</code>
  </resolution>
  <references>
    <uri link="http://www.coresecurity.com/common/showdoc.php?idx=417&amp;idxseccion=10">Corelabs Advisory</uri>
    <uri link="http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html">PuTTY ChangeLog</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1440">CVE-2004-1440</uri>
  </references>
  <metadata tag="requester" timestamp="Wed,  4 Aug 2004 17:20:53 +0000">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="Thu,  5 Aug 2004 09:03:08 +0000">
    jaervosz
  </metadata>
</glsa>