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Reading: No auto-update in Bitcoin Core means 13% of nodes might crash
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Michigan Post > Blog > Crypto & Web 3 > No auto-update in Bitcoin Core means 13% of nodes might crash
Crypto & Web 3

No auto-update in Bitcoin Core means 13% of nodes might crash

By Editorial Board Published October 10, 2024 3 Min Read
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No auto-update in Bitcoin Core means 13% of nodes might crash

Bitcoin builders right now disclosed particulars of one other high-severity software program bug. In keeping with senior Core builders, over 13% of the house and enterprise computer systems around the globe that implement Bitcoin’s guidelines are susceptible to a distant shutdown.

The bug, named CVE-2024-35202, impacts Bitcoin nodes working Core software program previous to model 25.0. Nodes that haven’t up to date to a minimum of 25.0 enable an attacker to remotely exploit an assertion within the software program logic that handles block transaction (‘blocktxn’) messages.

Particularly, the vulnerability stems from Core’s compact block protocol, which makes use of shortened transaction identifiers to cut back web bandwidth use. An attacker can set off a collision in these identifiers, inflicting the node to request a full block.

Though requesting a full, unabridged block is a security precaution, software program variations previous to 25.0 have a flaw of their dealing with logic of subsequent blocktxn messages. In brief, the node could be pressured into an invalid state by way of manipulating logic gates, inflicting it to crash totally.

Bug patched since Might 2023, however Bitcoin Core doesn’t auto-update

Credit score for locating and disclosing the vulnerability goes to Niklas Gögge, who additionally offered the patch carried out in Bitcoin Core v25.0. He patched this bug in Bitcoin Core pull request quantity 26898 and different builders had merged it into manufacturing by Might 26, 2023.

In keeping with self-declared values declared by internet-accessible nodes tracked by BitNodes.io, 13.7% of the 18,843 nodes working the Bitcoin community are susceptible to the assault. Builders encourage all node operators to replace their software program to patch this vulnerability. The newest model of Bitcoin Core software program is 28.0. 

Though fairly critical, the bug has little monetary profit to a median attacker, because it requires subtle manipulation of the compact block protocol and doesn’t enable for double-spending of bitcoin with out coordinating quite a lot of different monetary and social engineering schemes.

Nonetheless, it’s a safety vulnerability that may very well be exploited by a company or governmental actor who desires to disrupt the operations of Bitcoin for financially-deferred causes.

The disclosure of this bug follows a current pattern of Bitcoin Core builders revealing critical vulnerabilities in older software program variations. As a result of Core software program doesn’t routinely replace by default, node operators should manually select to obtain, confirm, and replace their software program.

Until Bitcoin node operators replace their software program, a portion of the community may very well be prone to a shutdown.

TAGGED:autoupdatebitcoinCorecrashmeansnodes
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