CVE-2021-39193 – Transaction validity oversight in pallet-ethereum

https://notcve.org/view.php?id=CVE-2021-39193

Frontier is Substrate's Ethereum compatibility layer. Prior to commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26, a bug in `pallet-ethereum` can cause invalid transactions to be included in the Ethereum block state in `pallet-ethereum` due to not validating the input data size. Any invalid transactions included this way have no possibility to alter the internal Ethereum or Substrate state. The transaction will appear to have be included, but is of no effect as it is rejected by the EVM engine. The impact is further limited by Substrate extrinsic size constraints. • https://github.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7861b26 https://github.com/paritytech/frontier/pull/465 https://github.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e4335b00623832849ae https://github.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xm • CWE-20: Improper Input Validation CWE-1284: Improper Validation of Specified Quantity in Input •