CVE-2021-41138
Validity check missing in Frontier
Impact
### Impact 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. ### Patches The issue is patched in commit 146bb48849e5393004be5c88beefe76fdf009aba. ### References Patch PR: https://github.com/paritytech/frontier/pull/495 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Frontier repo](https://github.com/paritytech/frontier/issues) ### Special thanks Special thanks to @librelois, @nanocryk and the Moonbeam team for reporting and fixing this security vulnerability.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | pallet-ethereum | <= 3.0.0 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Parity | Frontier | from 2021-09-30 before 2021-10-13 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/paritytech/frontier/commit/146bb48849e5393004be5c88beefe76fdf009aba
- https://github.com/paritytech/frontier/pull/497
- https://github.com/paritytech/frontier/security/advisories/GHSA-vj62-g63v-f8mf
- https://github.com/advisories/GHSA-vj62-g63v-f8mf
- https://github.com/paritytech/frontier/pull/495
- https://nvd.nist.gov/vuln/detail/CVE-2021-41138