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<div>Fair points, though once we start down the path of "unknown unknowns" Donald Rumsfeld gets to smile...and we can't have that.</div>
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<span style="font-weight:bold">From: </span>Damian Menscher <<a href="mailto:damian@google.com">damian@google.com</a>><br>
<span style="font-weight:bold">Date: </span>Tuesday, February 23, 2016 at 1:20 PM<br>
<span style="font-weight:bold">To: </span>michoski <<a href="mailto:michoski@cisco.com">michoski@cisco.com</a>><br>
<span style="font-weight:bold">Cc: </span>"<a href="mailto:dns-operations@dns-oarc.net">dns-operations@dns-oarc.net</a>" <<a href="mailto:dns-operations@dns-oarc.net">dns-operations@dns-oarc.net</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [dns-operations] CVE-2015-7547: glibc getaddrinfo buffer overflow<br>
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<div class="gmail_quote">On Tue, Feb 23, 2016 at 10:01 AM, Mike Hoskins (michoski)
<span dir="ltr"><<a href="mailto:michoski@cisco.com" target="_blank">michoski@cisco.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div id=":4mn" class="a3s" style="overflow:hidden">Just in case anyone's wondering, OpenDNS isn't affected.<br>
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<a href="https://engineering.opendns.com/2016/02/17/2980/" rel="noreferrer" target="_blank">https://engineering.opendns.com/2016/02/17/2980/</a></div>
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They're not directly vulnerable, but their claim that they protect their users is a bit over-stated -- all RFC-compliant DNS servers provide the same protections (not forwarding packets that don't follow the DNS spec). The problem is that there *might* be
a way to exploit this via RFC-compliant DNS packets (I'm personally not convinced, but nobody wants to claim it's impossible). And that would get past their defenses (and everyone else's).</div>
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<div class="gmail_extra">Additionally, anyone using a remote resolver is vulnerable to a MitM injecting a malicious response, so everyone should upgrade. Claims that OpenDNS users "aren't affected" are misleading and dangerous.</div>
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<div class="gmail_extra">Damian</div>
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