GitHub Advisoryadvisory · crates.io

GHSA-v57h-6hmh-g2p4 Weight not properly refunded after EVM execution

MEDIUM Published 2022-09-23 Modified 2024-10-24 Official page ↗
Aliases
CVE-2022-39242
Ecosystem
crates.io
Packages
pallet-ethereum
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-682
Reviewed
2022-09-23

Affected packages

• crates.io pallet-ethereum: <= 3.0.0 (no fix yet)

Description

Impact Previously, 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. This issue is fixed by properly refund unused weights after each EVM execution. 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. Patches The issue is fixed in https://github.com/paritytech/frontier/pull/851 Workarounds None. References _Are there any links users can visit to find out more?_ For more information If you have any questions or comments about this advisory: • Open an issue in Frontier repo • Email Wei

Related

Alias · CVE (1)

  • CVE-2022-39242 Frontier is an Ethereum compatibility layer for Substrate. vulnerability

Weakness · CWE (1)

  • CWE-682 Incorrect Calculation weakness

References