Vulnerability Details CVE-2022-21685
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.0%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.0
References
- https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664
- https://github.com/paritytech/frontier/pull/549
- https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4
- https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664
- https://github.com/paritytech/frontier/pull/549
- https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4