glsa-200312-06.xml


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

<glsa id="200312-06">
  <title>XChat: malformed dcc send request denial of service</title>
  <synopsis>
    A bug in XChat could allow malformed dcc send requests to cause a denial of
    service.
  </synopsis>
  <product type="ebuild">xchat</product>
  <announced>2003-12-14</announced>
  <revised>2003-12-14: 01</revised>
  <bug>35623</bug>
  <access>remote</access>
  <affected>
    <package name="net-irc/xchat" auto="yes" arch="*">
      <unaffected range="ge">2.0.6-r1</unaffected>
      <vulnerable range="eq">2.0.6</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    XChat is a multiplatform IRC client.
    </p>
  </background>
  <description>
    <p>
    There is a remotely exploitable bug in XChat 2.0.6 that could lead to a
    denial of service attack.  Gentoo wishes to thank lloydbates for discovering
    this bug, as well as jcdutton and rac for submitting patches to fix the bug.
    </p>
  </description>
  <impact type="medium">
    <p>
    A malformed DCC packet sent by a remote attacker can cause XChat to crash.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    For Gentoo users, xchat-2.0.6 was marked ~arch (unstable) for most
    architectures.  Since it was never marked as stable in the portage tree,
    only xchat users who have explictly added the unstable keyword to
    ACCEPT_KEYWORDS are affected.  Users may updated affected machines to the
    patched version of xchat using the following commands:
    </p>
    <code>
    # emerge sync
    # emerge -pv '&gt;=net-irc/xchat-2.0.6-r1'
    # emerge '&gt;=net-irc/xchat-2.0.6-r1'
    # emerge clean</code>
    <p>
    This assumes that users are running with ACCEPT_KEYWORDS enabled for their
    architecture.
    </p>
  </resolution>
  <references>
    <uri link="http://mail.nl.linux.org/xchat-announce/2003-12/msg00000.html">XChat Announcement</uri>
  </references>
</glsa>