Vulnerability Description
Frontier is Substrate's Ethereum compatibility layer. In affected versions the truncation done when converting between EVM balance type and Substrate balance type was incorrectly implemented. This leads to possible discrepancy between appeared EVM transfer value and actual Substrate value transferred. It is recommended that an emergency upgrade to be planned and EVM execution temporarily paused in the mean time. The issue is patched in Frontier master branch commit fed5e0a9577c10bea021721e8c2c5c378e16bf66 and polkadot-v0.9.22 branch commit e3e427fa2e5d1200a784679f8015d4774cedc934. This vulnerability affects only EVM internal states, but not Substrate balance states or node. You can temporarily pause EVM execution (by setting up a Substrate `CallFilter` that disables `pallet-evm` and `pallet-ethereum` calls before the patch can be applied.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parity | Frontier | - |
Related Weaknesses (CWE)
References
- https://github.com/paritytech/frontier/commit/e3e427fa2e5d1200a784679f8015d4774cPatchThird Party Advisory
- https://github.com/paritytech/frontier/commit/fed5e0a9577c10bea021721e8c2c5c378ePatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/753Issue TrackingPatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-hc8w-mx86-9fcjPatchThird Party Advisory
- https://github.com/paritytech/frontier/commit/e3e427fa2e5d1200a784679f8015d4774cPatchThird Party Advisory
- https://github.com/paritytech/frontier/commit/fed5e0a9577c10bea021721e8c2c5c378ePatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/753Issue TrackingPatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-hc8w-mx86-9fcjPatchThird Party Advisory
FAQ
What is CVE-2022-31111?
CVE-2022-31111 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Frontier is Substrate's Ethereum compatibility layer. In affected versions the truncation done when converting between EVM balance type and Substrate balance type was incorrectly implemented. This lea...
How severe is CVE-2022-31111?
CVE-2022-31111 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-2022-31111?
Check the references section above for vendor advisories and patch information. Affected products include: Parity Frontier.