Integer overflow in Parity Frontier
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (70.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Parity Frontier
- Paritytech Frontier — versions < 8a93fdc
Weakness classification (CWE)
References
- github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4 (Patch, Third Party Advisory)
- github.com/paritytech/frontier/pull/549 (Patch, Third Party Advisory)
- github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-21685?
- CVE-2022-21685 is a medium-severity vulnerability in Parity Frontier, classified under Integer Underflow. CVSS score: 6.5/10. Published 2022-01-14.
- How severe is CVE-2022-21685?
- Medium severity. CVSS v3 base score is 6.5 out of 10.