Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com
	designates 74.125.82.53 as permitted sender)
	client-ip=74.125.82.53; envelope-from=gavinandresen@gmail.com;
	helo=mail-wg0-f53.google.com; 
MIME-Version: 1.0
Sender: gavinandresen@gmail.com
Date: Wed, 4 Sep 2013 11:16:35 +1000
Message-ID: <CABsx9T1hwD3psM14mGKwWpk3RwZTXJviP=AtcHWpBeYbAB410A@mail.gmail.com>
From: Gavin Andresen <gavin@bitcoinfoundation.org>
To: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Content-Type: multipart/alternative; boundary=001a11c3430277490804e5848e19
Subject: [Bitcoin-development] 0.8.4 released,
	fixes critical denial-of-service issue
Precedence: list

--001a11c3430277490804e5848e19
Content-Type: text/plain; charset=ISO-8859-1

Bitcoin-Qt version 0.8.4 is now available from:
  http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.8.4/

This is a maintenance release to fix a critical bug and three
security issues; we urge all users to upgrade.

There were no changes from 0.8.4 release candidate 2, so if you are running
0.8.4rc2 you do not need to upgrade.

Please report bugs using the issue tracker at github:
  https://github.com/bitcoin/bitcoin/issues


How to Upgrade
--------------

If you are running an older version, shut it down. Wait
until it has completely shut down (which might take a few minutes for older
versions), then run the installer (on Windows) or just copy over
/Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).

If you are upgrading from version 0.7.2 or earlier, the first time you
run 0.8.4 your blockchain files will be re-indexed, which will take
anywhere from 30 minutes to several hours, depending on the speed of
your machine.

0.8.4 Release notes
===================

Security issues
---------------

An attacker could send a series of messages that resulted in
an integer division-by-zero error in the Bloom Filter handling
code, causing the Bitcoin-Qt or bitcoind process to crash.
Bloom filters were introduced with version 0.8, so versions 0.8.0
through 0.8.3 are vulnerable to this critical denial-of-service attack.

A constant-time algorithm is now used to check RPC password
guess attempts; fixes https://github.com/bitcoin/bitcoin/issues/2838
(CVE-2013-4165)

Implement a better fix for the fill-memory-with-orphan-transactions
attack that was fixed in 0.8.3. See
https://bitslog.wordpress.com/2013/07/18/buggy-cve-2013-4627-patch-open-new-vectors-of-attack/
for a description of the weaknesses of the previous fix.
(CVE-2013-4627)

Bugs fixed
----------

Fix multi-block reorg transaction resurrection.

Fix non-standard disconnected transactions causing mempool orphans.
This bug could cause nodes running with the -debug flag to crash.

OSX: use 'FD_FULLSYNC' with LevelDB, which will (hopefully!)
prevent the database corruption issues many people have
experienced on OSX.

Linux: clicking on bitcoin: links was broken if you were using
a Gnome-based desktop.

Fix a hang-at-shutdown bug that only affects users that compile
their own version of Bitcoin against Boost versions 1.50-1.52.

Other changes
-------------

Checkpoint at block 250,000 to speed up initial block downloads
and make the progress indicator when downloading more accurate.


Thanks to everybody who contributed to the 0.8.4 releases!
----------------------------------------------------------

Pieter Wuille
Warren Togami
Patrick Strateman
pakt
Gregory Maxwell
Sergio Demian Lerner
grayleonard
Cory Fields
Matt Corallo
Gavin Andresen

--001a11c3430277490804e5848e19
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Bitcoin-Qt version 0.8.4 is now available from:<br></=
div><div>=A0 <a href=3D"http://sourceforge.net/projects/bitcoin/files/Bitco=
in/bitcoin-0.8.4/">http://sourceforge.net/projects/bitcoin/files/Bitcoin/bi=
tcoin-0.8.4/</a></div>
<div><br></div><div>This is a maintenance release to fix a critical bug and=
 three</div><div>security issues; we urge all users to upgrade.</div><div><=
br></div><div>There were no changes from 0.8.4 release candidate 2, so if y=
ou are running</div>
<div>0.8.4rc2 you do not need to upgrade.</div><div><br></div><div>Please r=
eport bugs using the issue tracker at github:</div><div>=A0 <a href=3D"http=
s://github.com/bitcoin/bitcoin/issues">https://github.com/bitcoin/bitcoin/i=
ssues</a></div>
<div><br></div><div><br></div><div>How to Upgrade</div><div>--------------<=
/div><div><br></div><div>If you are running an older version, shut it down.=
 Wait</div><div>until it has completely shut down (which might take a few m=
inutes for older</div>
<div>versions), then run the installer (on Windows) or just copy over</div>=
<div>/Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).</=
div><div><br></div><div>If you are upgrading from version 0.7.2 or earlier,=
 the first time you</div>
<div>run 0.8.4 your blockchain files will be re-indexed, which will take</d=
iv><div>anywhere from 30 minutes to several hours, depending on the speed o=
f</div><div>your machine.</div><div><br></div><div>0.8.4 Release notes</div=
>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div><div><b=
r></div><div>Security issues</div><div>---------------</div><div><br></div>=
<div>An attacker could send a series of messages that resulted in</div><div=
>an integer division-by-zero error in the Bloom Filter handling</div>
<div>code, causing the Bitcoin-Qt or bitcoind process to crash.</div><div>B=
loom filters were introduced with version 0.8, so versions 0.8.0</div><div>=
through 0.8.3 are vulnerable to this critical denial-of-service attack.</di=
v>
<div><br></div><div>A constant-time algorithm is now used to check RPC pass=
word</div><div>guess attempts; fixes <a href=3D"https://github.com/bitcoin/=
bitcoin/issues/2838">https://github.com/bitcoin/bitcoin/issues/2838</a></di=
v>
<div>(CVE-2013-4165)</div><div><br></div><div>Implement a better fix for th=
e fill-memory-with-orphan-transactions</div><div>attack that was fixed in 0=
.8.3. See</div><div><a href=3D"https://bitslog.wordpress.com/2013/07/18/bug=
gy-cve-2013-4627-patch-open-new-vectors-of-attack/">https://bitslog.wordpre=
ss.com/2013/07/18/buggy-cve-2013-4627-patch-open-new-vectors-of-attack/</a>=
</div>
<div>for a description of the weaknesses of the previous fix.</div><div>(CV=
E-2013-4627)</div><div><br></div><div>Bugs fixed</div><div>----------</div>=
<div><br></div><div>Fix multi-block reorg transaction resurrection.</div>
<div><br></div><div>Fix non-standard disconnected transactions causing memp=
ool orphans.</div><div>This bug could cause nodes running with the -debug f=
lag to crash.</div><div><br></div><div>OSX: use &#39;FD_FULLSYNC&#39; with =
LevelDB, which will (hopefully!)</div>
<div>prevent the database corruption issues many people have</div><div>expe=
rienced on OSX.</div><div><br></div><div>Linux: clicking on bitcoin: links =
was broken if you were using</div><div>a Gnome-based desktop.</div><div>
<br></div><div>Fix a hang-at-shutdown bug that only affects users that comp=
ile</div><div>their own version of Bitcoin against Boost versions 1.50-1.52=
.</div><div><br></div><div>Other changes</div><div>-------------</div><div>
<br></div><div>Checkpoint at block 250,000 to speed up initial block downlo=
ads</div><div>and make the progress indicator when downloading more accurat=
e.</div><div><br></div><div><br></div><div>Thanks to everybody who contribu=
ted to the 0.8.4 releases!</div>
<div>----------------------------------------------------------</div><div><=
br></div><div>Pieter Wuille</div><div>Warren Togami</div><div>Patrick Strat=
eman</div><div>pakt</div><div>Gregory Maxwell</div><div>Sergio Demian Lerne=
r</div>
<div>grayleonard</div><div>Cory Fields</div><div>Matt Corallo</div><div>Gav=
in Andresen</div><div><br></div>
</div>

--001a11c3430277490804e5848e19--