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From: Jeremy <jlrubin@MIT.EDU>
Date: Sun, 27 Jul 2014 22:12:11 -0400
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Cc: alex@stamos.org
Subject: [Bitcoin-development] Abnormally Large Tor node accepting only
Bitcoin traffic
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Hey,
There is a potential network exploit going on. In the last three days, a
node (unnamed) came online and is now processing the most traffic out of
any tor node -- and it is mostly plaintext Bitcoin traffic.
http://torstatus.blutmagie.de/router_detail.php?FP=3D0d6d2caafbb32ba85ee516=
2395f610ae42930124
Alex Stamos (cc'ed) and I have been discussing on twitter what this could
mean, wanted to raise it to the attention of this group for discussion.
What we know so far:
- Only port 8333 is open
- The node has been up for 3 days, and is doing a lot of bandwidth, mostly
plaintext Bitcoin traffic
- This is probably pretty expensive to run? Alex suggests that the most
expensive server at the company hosting is 299=E2=82=AC/mo with 50TB of tra=
ffic
--=20
Jeremy Rubin
--089e014941489553f604ff3774bd
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif;font-size:small;color:rgb(0,0,0)">Hey,<br><br></div><div=
class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;fo=
nt-size:small;color:rgb(0,0,0)">
There is a potential network exploit going on. In the last three days, a no=
de (unnamed) came online and is now processing the most traffic out of any =
tor node -- and it is mostly plaintext Bitcoin traffic.<br><br><a href=3D"h=
ttp://torstatus.blutmagie.de/router_detail.php?FP=3D0d6d2caafbb32ba85ee5162=
395f610ae42930124">http://torstatus.blutmagie.de/router_detail.php?FP=3D0d6=
d2caafbb32ba85ee5162395f610ae42930124</a><br>
<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small;color:rgb(0,0,0)">Alex Stamos (cc'ed) and I=
have been discussing on twitter what this could mean, wanted to raise it t=
o the attention of this group for discussion.<br>
<br></div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica=
,sans-serif;font-size:small;color:rgb(0,0,0)">What we know so far:<br><br><=
/div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,sans=
-serif;font-size:small;color:rgb(0,0,0)">
- Only port 8333 is open<br></div><div class=3D"gmail_default" style=3D"fon=
t-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0,0,0)">- The=
node has been up for 3 days, and is doing a lot of bandwidth, mostly plain=
text Bitcoin traffic<br>
</div><div class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small;color:rgb(0,0,0)">- This is probably pretty expensi=
ve to run? Alex suggests that the most expensive server at the company host=
ing is 299=E2=82=AC/mo with 50TB of traffic</div>
<br clear=3D"all"><br>-- <br><div dir=3D"ltr">Jeremy Rubin</div>
</div>
--089e014941489553f604ff3774bd--
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