+A denial-of-service vulnerability that affects all versions of +bitcoind and Bitcoin-Qt has been reported and fixed. An attacker +could isolate a victim's node and cause the creation of blockchain +forks. +
++Because this bug could be exploited to severely disrupt the Bitcoin +network we consider this a critical vulnerability, and encourage +everybody to upgrade to the latest version: 0.6.2. +
++Backports for older releases (0.5.5 and 0.4.6) are also available if +you cannot upgrade to version 0.6.2. +
++Full technical details are being withheld to give people the +opportunity to upgrade. +
++Thanks to Forrest Voight for discovering and reporting the vulnerability. +
++Questions that might be frequently asked: +
++How would I know if I am the victim of this attack? +
++Your bitcoin process would stop processing blocks and would have a +different block count from the rest of the network (you can see the +current block count at websites like blockexplorer.com or +blockchain.info). Eventually it would display the message: +
+WARNING: Displayed transactions may not be correct! You may need to +upgrade, or other nodes may need to upgrade.+
+(note that this message is displayed whenever your bitcoin process +detects that the rest of the network seems to have a different +block count, which can happen for several reasons unrelated to +this vulnerability). +
++Could this bug be used to steal my wallet? +
++No. +
++Could this bug be used to install malware on my system? +
++No. +
+