Frontier is Substrate's Ethereum compatibility layer. In the newly introduced signed Frontier-specific extrinsic for `pallet-ethereum`, a large part of transaction validation logic was only called in transaction pool validation, but not in block execution. Malicious validators can take advantage of this to put invalid transactions into a block. The attack is limited in that the signature is always validated, and the majority of the validation is done again in the subsequent `pallet-evm` execution logic. However, do note that a chain ID replay attack was possible. In addition, spamming attacks are of main concerns, while they are limited by Substrate block size limits and other factors. The issue is patched in commit `146bb48849e5393004be5c88beefe76fdf009aba`.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-10-13T15:15:11

Updated: 2024-08-04T02:59:31.757Z

Reserved: 2021-09-15T00:00:00

Link: CVE-2021-41138

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-10-13T16:15:07.847

Modified: 2021-10-20T16:45:01.823

Link: CVE-2021-41138

cve-icon Redhat

No data.