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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>