Amazing blockchain wallet vulnerabilities discovered by researchers bitcoin news

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The attacker was able to cancel the transaction in a way your bank had failed to detect. The issue here is that bitcoin transactions themselves are reversible. A typical transaction takes several hours before it cannot be reversed. As Crypto Briefing noted , bitcoin veterans know to check for confirmation of the transaction before considering it final, but new users can be tricked by seeing an artificially inflated wallet balance.

RBF is a standard method designed to allow users to undo an unconfirmed transaction by sending another transaction spending the same coins with a higher fee. In the case of the affected wallets, the way they handle RBF opens the door to double-spending attacks. Depending on the desired outcome, attacks can come in different forms as well.

In the basic double-spend attack, attackers send the victim a bitcoin asking for goods or services in return, then cancel the transaction immediately. But this attack is only possible when there is a flaw in the configuration of one of the Lightning Networks watchtowers. Watchtowers role The watchtowers keep track of the state of the Lightning Network and store all data used for regular transactions, also called justice transactions.

Honest nodes will have to submit justice transactions to dispute the fraudulent requests, so if all watchtowers are working effectively, it is easy to ascertain fraudulent channel closing requests. A poorly maintained watchtower can provide the perfect entry point for a mass double-spend attack, which could significantly affect the victims.

A double spend attack would be disastrous for the network The researchers wrote that a double-spend attack could be the most catastrophic if it happens. They added that the severity would only increase as the network continues to develop, hence the need to deal with the vulnerabilities effectively and immediately. They concluded by recommending the careful configuration of watchtowers. The new revelation further adds to the list of other vulnerabilities on the network, such as a Griefing attack, Flood and loot, time dilation eclipse, and pinning.

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