Now Ethereum lauch update urgent for vulnerability to possible denial of service attacks "DoS Attack"
Urgent Update (v1.7.2) Geth 1.7.2 is a hotfix release to address a DOS vulnerability in the EVM starting at Byzantium. Please upgrade before block 4_370_000!This is a version developed and released urgently due to the closeness of the update of the Byzantium network, this October 17 or undermining the 4,370,000 block of its network
Parity made another Ethereum client update. released yesterday in its GitHub its version 1.7.6. This is an equally urgent and mandatory version for the next Byzantium update. It is important for those operating a complete Ethereum node to update any of the customers they use and be aware of any changes that may occur before this October 17th.