Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parity | Frontier | < 2021-09-03 |
Related Weaknesses (CWE)
References
- https://github.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7PatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/465PatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e43PatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xmPatchThird Party Advisory
- https://github.com/paritytech/frontier/commit/0b962f218f0cdd796dadfe26c3f09e68f7PatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/465PatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/465/commits/8a2b890a2fb477d5fedd0e43PatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-hw4v-5x4h-c3xmPatchThird Party Advisory
FAQ
What is CVE-2021-39193?
CVE-2021-39193 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 E...
How severe is CVE-2021-39193?
CVE-2021-39193 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39193?
Check the references section above for vendor advisories and patch information. Affected products include: Parity Frontier.