Vulnerability in Parity Frontier
CVE-2022-39242
Frontier is an Ethereum compatibility layer for Substrate. Prior to commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658, the worst case weight was always accounted as the block weight for all cases. In case of large EVM gas refunds, this can lead to block spamming attacks -- the adversary can construct blocks with transactions that have large amount of refunds or unused gases with reverts, and as a result inflate up the chain gas prices. The impact of this issue is limited in that the spamming attack would still be costly for any adversary, and it has no ability to alter any chain state. This issue has been patched in commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658. There are no known workarounds.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001
Affected products
- Parity Frontier
- Paritytech Frontier — versions < commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658
Weakness classification (CWE)
References
- github.com/paritytech/frontier/security/advisories/GHSA-v57h-6hmh-g2p4 (Third Party Advisory)
- github.com/paritytech/frontier/pull/851 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-39242?
- CVE-2022-39242 is a medium-severity vulnerability in Parity Frontier, classified under Incorrect Calculation. CVSS score: 5.3/10. Published 2022-09-24.
- How severe is CVE-2022-39242?
- Medium severity. CVSS v3 base score is 5.3 out of 10.