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