Ethereum Nodes Crashing, Under Possible Attack
The Ethereum community is reeling after what appears to be another attack on the network. All nodes running the Geth client appear to be affected. Geth Nodes Running Out of Memory. Ethereum developer and co-founder Jeffrey Wilcke posted a Security Alert on the official Ethereum blog on 18 September. Geth nodes, he said, were “running out of memory and crashing on block 2283416“. He advised users to switch to an alternate client until the problem is fixed. Geth is the the command line interface for running a full Ethereum node implemented in Go. While Geth clients are not a majority on the....
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Ethereum protocol hit by another DOS attack, the second one in less than a week! Ethereum is definitely heading towards trouble. The promising blockchain-based smart contracts protocol has been facing a lot of issues in the recent days, the latest one being yet another DOS attack. A brief alert about the latest DOS attack was published earlier yesterday on Ethereum’s blog. The alert statement reads, “URGENT ALL MINERS: The network is under attack. …a computational DDoS, i.e. miners and nodes need to spend a very long time processing some blocks. …due to the EXTCODESIZE opcode, which has a....
Almost immediately after all geth nodes crashed due to an out of memory bug, the Ethereum development team released yet another urgent announcement to miners regarding a computational DDoS attack, which significantly delayed nodes and miners in processing blocks. Jeffrey Wilcke, the Ethereum co-founder and lead developer, released a statement to ask all miners and developers to switch to parity mining instead of utilizing geth nodes, which caused some trouble in authenticating and validating some blocks due to the EXTCODESIZE opcode. Wilcke further explained that the Ethereum development....
Ethereum Classic lost more than 10% of its value today with price standing just above $1 as the network comes under sustained dos attack. The attacks are similar to those experienced by Ethereum over last month. A programmer is exploiting gas mispricing for certain op codes to drain nodes of memory and other resources thus slowing them down. Who or why is a matter of speculation. For ETC, considering the dramatic price movement, it could well be financially motivated and might not even be the original attacker, but a copycat. Ethereum Classic’s Price Crashes as Network Comes Under Dos....
Sunday, an Ethereum miner discovered an error stemming from a memory leak that reduced the RAM usage of Ethereum mining rigs, leading to a sudden drop in hashrate and security levels. Temporary solution. The Ethereum development team quickly responded to the attack by implementing an update called Geth 1.4.12 as a temporary solution. All miners and node operators were advised to update immediately, to refrain from geth nodes running out of memory and crashing on block. According to the Ethereum security alert, the memory bug in geth has been marked as a high severity security issue and is....
Kristov Atlas has developed a quick tool called TorBan which can warn of a Bitcoin-over-Tor de-anonymization attack, called the "Luxembourg Attack." The "Luxembourg Attack," first described by University of Luxembourg researchers Ivan Pustogarov and Alex Biryukov earlier this year, involves the use of thousands of Bitcoin nodes and a handful of controlled Tor exit nodes to "de-anonymize" users using Bitcoin over Tor. The Luxembourg research paper, titled "Bitcoin over Tor isn't a good idea" detailed the potential attack. The Bitcoin network has built-in denial-of-service (DoS) attack....