CVE-2022-31111

Discrepency in transfer value and actual value due to incorrect truncation in Frontier

Description

Frontier is Substrate's Ethereum compatibility layer. In affected versions the truncation done when converting between EVM balance type and Substrate balance type was incorrectly implemented. This leads to possible discrepancy between appeared EVM transfer value and actual Substrate value transferred. It is recommended that an emergency upgrade to be planned and EVM execution temporarily paused in the mean time. The issue is patched in Frontier master branch commit fed5e0a9577c10bea021721e8c2c5c378e16bf66 and polkadot-v0.9.22 branch commit e3e427fa2e5d1200a784679f8015d4774cedc934. This vulnerability affects only EVM internal states, but not Substrate balance states or node. You can temporarily pause EVM execution (by setting up a Substrate `CallFilter` that disables `pallet-evm` and `pallet-ethereum` calls before the patch can be applied.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.15%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: paritytech frontier
Published at:
Updated at:

References

Link Tags
https://github.com/paritytech/frontier/security/advisories/GHSA-hc8w-mx86-9fcj third party advisory patch
https://github.com/paritytech/frontier/pull/753 issue tracking third party advisory patch
https://github.com/paritytech/frontier/commit/e3e427fa2e5d1200a784679f8015d4774cedc934 third party advisory patch
https://github.com/paritytech/frontier/commit/fed5e0a9577c10bea021721e8c2c5c378e16bf66 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-31111?
CVE-2022-31111 has been scored as a medium severity vulnerability.
How to fix CVE-2022-31111?
To fix CVE-2022-31111, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-31111 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-31111 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-31111?
CVE-2022-31111 affects paritytech frontier.
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