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Author Topic: wxBitcoin/bitcoind version 0.4.1  (Read 1740 times)
Luke-Jr
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November 21, 2011, 08:45:13 PM
 #1

Bitcoin version 0.4.1 is now available for download at:
  http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.4.1/

This is a bugfix only release based on 0.4.0.

Please report bugs by replying to this forum thread.

MAJOR BUG FIX  (CVE-2011-4447)

The wallet encryption feature introduced in Bitcoin version 0.4.0 did not sufficiently secure the private keys. An attacker who
managed to get a copy of your encrypted wallet.dat file might be able to recover some or all of the unencrypted keys and steal the
associated coins.

If you have a previously encrypted wallet.dat, the first time you run wxbitcoin or bitcoind the wallet will be rewritten, Bitcoin will
shut down, and you will be prompted to restart it to run with the new, properly encrypted file.

If you had a previously encrypted wallet.dat that might have been copied or stolen (for example, you backed it up to a public
location) you should send all of your bitcoins to yourself using a new bitcoin address and stop using any previously generated addresses.

Wallets encrypted with this version of Bitcoin are written properly.

Technical note: the encrypted wallet's 'keypool' will be regenerated the first time you request a new bitcoin address; to be certain that the
new private keys are properly backed up you should:

1. Run Bitcoin and let it rewrite the wallet.dat file

2. Run it again, then ask it for a new bitcoin address.
 wxBitcoin: new address visible on main window
 bitcoind: run the 'walletpassphrase' RPC command to unlock the wallet,  then run the 'getnewaddress' RPC command.

3. If your encrypted wallet.dat may have been copied or stolen, send all of your bitcoins to the new bitcoin address.

4. Shut down Bitcoin, then backup the wallet.dat file.
 IMPORTANT: be sure to request a new bitcoin address before backing up, so that the 'keypool' is regenerated and backed up.

"Security in depth" is always a good idea, so choosing a secure location for the backup and/or encrypting the backup before uploading it is recommended. And as in previous releases, if your machine is infected by malware there are several ways an attacker might steal your bitcoins.

Thanks to Alan Reiner (etotheipi) for finding and reporting this bug.



Thanks to everybody who contributed code or helped test this release:

Gavin Andresen
Luke Dashjr
Pieter Wuille
Matt Corallo
cjdelisle
Wladimir J. van der Laan
Jeff Garzik
Victor Leschuk

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EuSouBitcoin
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November 22, 2011, 03:19:15 PM
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The folder inside the zip file says rc7. Is this rc7 or the final 0.4.1?
Luke-Jr
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November 22, 2011, 03:34:18 PM
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The folder inside the zip file says rc7. Is this rc7 or the final 0.4.1?
rc7 was just renamed to final 0.4.1 since no more bugs were found. I guess Gavin forgot to rename the folder... :/

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November 22, 2011, 05:45:43 PM
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Yes, I forgot to rename the folder.

Uploading a fixed 0.5.0 linux.tar.gz and win32.zip now (and SHASUMS.asc), will do the same for 0.4.1.

How often do you get the chance to work on a potentially world-changing project?
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