Vulnerability · Published Sep 3, 2021 · Assigned by GitHub_M
CVE-2021-39193Transaction validity oversight in pallet-ethereum
Medium 5.3
In plain English
A medium-severity improper input validation in frontier from paritytech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities).
Official description
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. A patch is available in commit number 0b962f218f0cdd796dadfe26c3f09e68f7861b26. There are no workarounds aside from applying the patch.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| paritytech | frontier | < 0b962f218f0cdd796dadfe26c3f09e68f7861b26 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://github.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xm x_refsource_CONFIRM
- https://github.com/paritytech/frontier/pull/465 x_refsource_MISC
- https://github.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e4335b00623832849ae x_refsource_MISC
- https://github.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7861b26 x_refsource_MISC