Geth bug found in Ethereum network

Ethereum developers find Geth bug as hardfork date is coming closer 
15 October 2017   3053

The developers of Ethereum's Geth software release a new version just days before the Byzantium hard fork due to the discovery of a denial-of-service (DoS) attack vulnerability.

Ethereum's Geth 1.7.2
Ethereum's Geth 1.7.2 urgent update

With Geth comprising about 75% of all Ethereum nodes, the vulnerability could leave nodes running the previous Byzantium-compatible release more susceptible to DoS attacks after the hard fork.

Casey Detrio, Ethereum developer, explains on reddit.com that the vulnerability stems from an oversight in one of the new Byzantium features. The risk is that this bug could be exploited by an attacker who wants to take ethereum nodes offline – a form of attack that the Ethereum community has dealt with in the past. 

The second concern is that there may be more undiscovered consensus bugs that could be found after the activation block, which would then result in needing to perform emergency client updates.
 

Casey Detrio
Ethereum developer

It's also worth mentioning, that yesterday, the team behind Parity issued a new release of its software that corrected a "consensus bug" – an error which could have caused the network to partition during the hard fork. 

Ethereum 2.0 Phase 0 Testnet to be Launched

Coin transfer option is not available to users, there are no smart contracts and functionality associated with the Ethereum virtual machine
08 May 2019   240

Prysmatic Labs has launched a test network for Ethereum 2.0 based on the Casper PoS protocol with staking support. The developers implemented the fourth version of the specifications for the main chain from the Ethereum Research team.

So, in order to run the validating node, you need to install the Prysm client, which is the only one for this network, and create a steak by sending Goerli testnet coins (3.2 ETH) to the new network.

Note that at the moment a limited number of validators can participate in the network. Also, the coin transfer option is not available to users, there are no smart contracts and functionality associated with the Ethereum virtual machine.

Earlier Buterin announced the Ethereum 2.0 or Serenity. This upgrade involves a transition to the Proof-Of-Stake (Casper) algorithm, the implementation of sharding (multiple parallel chains connected to the main one, for executing various smart contracts and ensuring decentralized applications), updating the virtual machine (EWASM), changing the cross-contract logic and economics of the protocol.