Vulnerability · Published Sep 24, 2022 · Assigned by GitHub_M
CVE-2022-39242Incorrect Calculation in Frontier leads to inflated Ethereum chain gas prices
Medium 5.3
In plain English
A medium-severity security flaw in frontier from paritytech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| paritytech | frontier | < commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658 |
Weakness: CWE-682 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/paritytech/frontier/security/advisories/GHSA-v57h-6hmh-g2p4 x_refsource_CONFIRM
- https://github.com/paritytech/frontier/pull/851 x_refsource_MISC