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* Adds Makefile test to ensure all subheadings, except those on Choose Your Wallet, have an ID (anchor reference) * Adds an ID to all subheads that didn't have on previously
65 lines
2.2 KiB
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65 lines
2.2 KiB
HTML
---
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title: "CVE-2012-2459: Critical Vulnerability (denial-of-service)"
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alias: "dos"
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active: false
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banner: ""
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---
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<h2 id="risks">Risks</h2>
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<p>
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A denial-of-service vulnerability that affects all versions of
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bitcoind and Bitcoin-Qt has been reported and fixed. An attacker
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could isolate a victim's node and cause the creation of blockchain
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forks.
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</p>
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<h2 id="solutions">Solutions</h2>
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<p>
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Because this bug could be exploited to severely disrupt the Bitcoin
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network we consider this a critical vulnerability, and encourage
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everybody to upgrade to <a href="http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.6.2/">the latest version: 0.6.2</a>.
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</p>
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<p>
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<a href="https://bitcointalk.org/?topic=79651">Backports for older releases (0.5.5 and 0.4.6) are also available</a> if
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you cannot upgrade to version 0.6.2.
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</p>
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<h2 id="technical-details">Technical Details</h2>
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<p>
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Full technical details are being withheld to give people the
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opportunity to upgrade.
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</p>
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<p>
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Thanks to <a href="http://forre.st/">Forrest Voight</a> for discovering and reporting the vulnerability.
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</p>
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<h2 id="questions-and-answers">Questions & Answers</h2>
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<h3 id="how-do-i-know">
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How would I know if I am the victim of this attack?
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</h3>
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<p>
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Your bitcoin process would stop processing blocks and would have a
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different block count from the rest of the network (you can see the
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current block count at websites like <a href="http://blockexplorer.com/">blockexplorer.com</a> or
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<a href="http://blockchain.info/">blockchain.info</a>). Eventually it would display the message:
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</p>
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<blockquote>WARNING: Displayed transactions may not be correct! You may need to
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upgrade, or other nodes may need to upgrade.</blockquote>
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<p>
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(note that this message is displayed whenever your bitcoin process
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detects that the rest of the network seems to have a different
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block count, which can happen for several reasons unrelated to
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this vulnerability).
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</p>
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<h3 id="can-my-wallet-be-stolen">
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Could this bug be used to steal my wallet?
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</h3>
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<p>
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No.
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</p>
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<h3 id="can-malware-be-installed">
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Could this bug be used to install malware on my system?
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</h3>
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<p>
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No.
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</p>
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<div style="text-align:right">
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<i>This notice last updated: Mon, 14 May 2012 17:00:00 UTC</i>
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</div>
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