Vulnerability Description
Frontier is Substrate's Ethereum compatibility layer. Prior to commit number `8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664`, a bug in Frontier's MODEXP precompile implementation can cause an integer underflow in certain conditions. This will cause a node crash for debug builds. For release builds (and production WebAssembly binaries), the impact is limited as it can only cause a normal EVM out-of-gas. Users who do not use MODEXP precompile in their runtime are not impacted. A patch is available in pull request #549.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parity | Frontier | <= 2022-01-13 |
Related Weaknesses (CWE)
References
- https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bPatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/549PatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4PatchThird Party Advisory
- https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bPatchThird Party Advisory
- https://github.com/paritytech/frontier/pull/549PatchThird Party Advisory
- https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4PatchThird Party Advisory
FAQ
What is CVE-2022-21685?
CVE-2022-21685 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Frontier is Substrate's Ethereum compatibility layer. Prior to commit number `8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664`, a bug in Frontier's MODEXP precompile implementation can cause an integer under...
How severe is CVE-2022-21685?
CVE-2022-21685 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-21685?
Check the references section above for vendor advisories and patch information. Affected products include: Parity Frontier.