CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2022-21685
Medium (6.5) in parity frontier. EPSS 1.3% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 1.3% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-31)
- CWE
- CWE-191
- Published
- Modified
- Record from
- the NVD, synced
Affected
- parity:frontier
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-cjg2-2fjg-fph4 | crates.io | pallet-evm-precompile-modexp | <=1.0.0 | no fix published |
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