Erroneous Proof of Work calculation in geth in github.com/ethereum/go-ethereum

Open Source Vulnerabilities CVE-2020-26240

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. An ethash mining DAG generation flaw in Geth before version 1.9.24 could cause miners to erroneously calculate PoW in an upcoming epoch (estimated early January, 2021). This happened on the ETC chain on 2020-11-06. This issue is relevant only for miners, non-mining nodes are unaffected. This issue is fixed as of 1.9.24

Open Source Vulnerabilities GHSA-v592-xf75-856p

### Impact An ethash mining DAG generation flaw in Geth could cause miners to erroneously calculate PoW in an upcoming epoch (estimated early January, 2021). This happened on the ETC chain on 2020-11-06. This issue is relevant only for miners, non-mining nodes are unaffected. ### Patches This issue is also fixed as of 1.9.24. Thanks to @slavikus for bringing the issue to our attention and writing the fix. ### Workarounds This PR implements a patch: https://github.com/ethereum/go-ethereum/pull/21793 ### References https://blog.ethereum.org/2020/11/12/geth_security_release/ ### For more information If you have any questions or comments about this advisory: * Open an issue in [go-ethereum](https://github.com/ethereum/go-ethereum) * Email us at [[email protected]](mailto:[email protected])

Open Source Vulnerabilities GO-2022-0775

Erroneous Proof of Work calculation in geth in github.com/ethereum/go-ethereum