Week in Ethereum News
September 18, 2021

Eth News and Links

Mainnet execution layer

  • Upgrade Nethermind nodes to v1.11.2! Unsuccessful attack publishing ~550 blocks with invalid PoWs, small number of Nethermind nodes switched to invalid chain, all affected nodes reorged back to good chain
  • Latest core devs call video. Notes from Tim Beiko:
    • PoW switch off difficulty to be hardcoded rather than computed
    • EIPs to include with difficulty bomb delay to be decided on next call; candidates: EIP3860 limit initcode, EIP3855 PUSH0 opcode and EIP3756 gas cap limit
  • Erigon v2021.09.03: fixes and tx pool improvements
  • Postmortem on August 27 minority chain split
  • Geth sunsetting fast sync, in favor of snap sync

Proof of stake consensus layer


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Stuff for developers


  • SushiSwap’s Miso ~860 ETH exploit changed recipient of Kia Sedona NFT proceeds, supply chain attack of front end; funds were returned
  • OpenZeppelin UUPS proxy post mortem, uninitialized implementation contracts could be self destructed bricking any proxy using it
  • Yearn Vesting Escrow bug, escrow could be reinitialized and bricked after ownership renounced
  • Yam Finance post mortem from minting 20 billion YAM in error
  • Privacy in DeFi, many trackers on DeFi websites can record Eth addresses and can trivially link to Personally Identifiable Information
  • Air dropped tokens with apparent high value revert on approve, directing to a website that sweeps highest held ERC20
  • OpenZeppelin security guidelines for contract development
  • Guide to using linear programming to calculate optimal parameters so as to determine maximum funds at risk when disclosing vulnerabilities
  • Babel, Daian, Kelkar paper on quantifying economic security, including tool for doing so



Application layer



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Dates of Note

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