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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Does anyone know if there are any patches available for this for
FC7 or do I just need to download and compile a new version of bind?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jason<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>
mailscanner-bounces@lists.mailscanner.info
[mailto:mailscanner-bounces@lists.mailscanner.info] <b>On Behalf Of </b>Randal,
Phil<br>
<b>Sent:</b> 10 July 2008 23:53<br>
<b>To:</b> MailScanner discussion<br>
<b>Subject:</b> RE: Watch it: Multiple DNS implementationsvulnerableto cachepoisoning<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>It looks like this vulnerability is rather serious:</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'><a
href="http://securosis.com/2008/07/09/more-on-the-dns-vulnerability/">http://securosis.com/2008/07/09/more-on-the-dns-vulnerability/</a><o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'> <o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>RedHat has released updated packages for RedHat 5.x:</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'><a href="http://rhn.redhat.com/errata/RHSA-2008-0533.html">http://rhn.redhat.com/errata/RHSA-2008-0533.html</a></span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>"[Updated
10th July 2008]<br>
We have updated the Enterprise Linux 5 packages in this advisory. The<br>
default and sample caching-nameserver configuration files have been updated<br>
so that they do not specify a fixed query-source port. Administrators<br>
wishing to take advantage of randomized UDP source ports should check their<br>
configuration file to ensure they have not specified fixed query-source ports."</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Hooray!</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>I've posted comments on Dan Kaminsky's blog and elsewhere drawing
people's attention to the need to check BIND config files.</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Cheers,</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Phil</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mailscanner-bounces@lists.mailscanner.info [mailto:mailscanner-bounces@lists.mailscanner.info]
<b>On Behalf Of </b>Randal, Phil<br>
<b>Sent:</b> 10 July 2008 13:21<br>
<b>To:</b> MailScanner discussion<br>
<b>Subject:</b> RE: Watch it: Multiple DNS implementationsvulnerableto
cachepoisoning</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>query-source defines the IP address (IPv4 or IPv6) and optional
port to be used as the source for <strong><span style='font-family:"Arial","sans-serif"'>outgoing</span></strong>
queries from the server</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>.</span><o:p></o:p></p>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>The default is a random unprivileged port.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>There may, of course, be over-zealous firewall rules (or SELinux
policies) which mistakenly insist that the source and destination ports are
both 53, but that's plain wrong.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>And dangerous.</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Cheers,</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Phil</span><o:p></o:p></p>
</div>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>--</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Phil Randal</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Networks
Engineer</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Herefordshire
Council</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hereford, UK</span>
<o:p></o:p></p>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mailscanner-bounces@lists.mailscanner.info
[mailto:mailscanner-bounces@lists.mailscanner.info] <b>On Behalf Of </b>Peter
Farrow<br>
<b>Sent:</b> 10 July 2008 13:07<br>
<b>To:</b> MailScanner discussion<br>
<b>Subject:</b> Re: Watch it: Multiple DNS implementations vulnerableto
cachepoisoning</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal>If you're running a public DNS server or a DNS server for
your LAN clients then these lines are an extremely good idea...<br>
<br>
P.<br>
<br>
<br>
Randal, Phil wrote: <o:p></o:p></p>
<pre>Have you made sure that in named.conf there are no<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> query-source port 53; <o:p></o:p></pre><pre> query-source-v6 port 53;<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>lines?<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Cheers,<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Phil<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>--<o:p></o:p></pre><pre>Phil Randal<o:p></o:p></pre><pre>Networks Engineer<o:p></o:p></pre><pre>Herefordshire Council<o:p></o:p></pre><pre>Hereford, UK<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>-----Original Message-----<o:p></o:p></pre><pre>From: <a
href="mailto:mailscanner-bounces@lists.mailscanner.info">mailscanner-bounces@lists.mailscanner.info</a><o:p></o:p></pre><pre>[<a
href="mailto:mailscanner-bounces@lists.mailscanner.info">mailto:mailscanner-bounces@lists.mailscanner.info</a>] On Behalf Of Jason<o:p></o:p></pre><pre>Ede<o:p></o:p></pre><pre>Sent: 10 July 2008 11:15<o:p></o:p></pre><pre>To: MailScanner discussion<o:p></o:p></pre><pre>Subject: RE: Watch it: Multiple DNS implementations vulnerable to<o:p></o:p></pre><pre>cachepoisoning<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>I've patched some servers and they're showing good, but on one behind a<o:p></o:p></pre><pre>firewall its still showing as poor despite the update being run... Its<o:p></o:p></pre><pre>running Centos5.1<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Jason<o:p></o:p></pre><pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre> <o:p></o:p></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>-----Original Message-----<o:p></o:p></pre><pre>From: <a
href="mailto:mailscanner-bounces@lists.mailscanner.info">mailscanner-bounces@lists.mailscanner.info</a> [<a
href="mailto:mailscanner">mailto:mailscanner</a>- <o:p></o:p></pre><pre><a
href="mailto:bounces@lists.mailscanner.info">bounces@lists.mailscanner.info</a>] On Behalf Of shuttlebox<o:p></o:p></pre><pre>Sent: 10 July 2008 09:42<o:p></o:p></pre><pre>To: MailScanner discussion<o:p></o:p></pre><pre>Subject: Re: Watch it: Multiple DNS implementations vulnerable to <o:p></o:p></pre><pre>cache poisoning<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>On Thu, Jul 10, 2008 at 3:54 AM, Ken A <a
href="mailto:ka@pacific.net"><ka@pacific.net></a> wrote:<o:p></o:p></pre><pre> <o:p></o:p></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>They are probably not random enough. You can look at them with<o:p></o:p></pre><pre> <o:p></o:p></pre></blockquote>
<pre>netstat or<o:p></o:p></pre><pre> <o:p></o:p></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>lsof -i<o:p></o:p></pre><pre> <o:p></o:p></pre></blockquote>
<pre>OK, it's the standard deviation that is key to the result. Unique <o:p></o:p></pre><pre>ports but all in a row for example is of course not good.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>I have now patched one server and it shows GOOD with a high std dev.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>/peter<o:p></o:p></pre><pre>--<o:p></o:p></pre><pre>Robert Benchley - "Drawing on my fine command of the English <o:p></o:p></pre><pre>language, I said nothing."<o:p></o:p></pre><pre>--<o:p></o:p></pre><pre>MailScanner mailing list<o:p></o:p></pre><pre><a
href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><o:p></o:p></pre><pre><a
href="http://lists.mailscanner.info/mailman/listinfo/mailscanner">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Before posting, read <a
href="http://wiki.mailscanner.info/posting">http://wiki.mailscanner.info/posting</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Support MailScanner development - buy the book off the website!<o:p></o:p></pre><pre> <o:p></o:p></pre></blockquote>
<pre>--<o:p></o:p></pre><pre>MailScanner mailing list<o:p></o:p></pre><pre><a
href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><o:p></o:p></pre><pre><a
href="http://lists.mailscanner.info/mailman/listinfo/mailscanner">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Before posting, read <a
href="http://wiki.mailscanner.info/posting">http://wiki.mailscanner.info/posting</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Support MailScanner development - buy the book off the website! <o:p></o:p></pre><pre>--<o:p></o:p></pre><pre>MailScanner mailing list<o:p></o:p></pre><pre><a
href="mailto:mailscanner@lists.mailscanner.info">mailscanner@lists.mailscanner.info</a><o:p></o:p></pre><pre><a
href="http://lists.mailscanner.info/mailman/listinfo/mailscanner">http://lists.mailscanner.info/mailman/listinfo/mailscanner</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Before posting, read <a
href="http://wiki.mailscanner.info/posting">http://wiki.mailscanner.info/posting</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Support MailScanner development - buy the book off the website!<o:p></o:p></pre><pre><o:p> </o:p></pre><pre> <o:p></o:p></pre>
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