CVE-2022-21685

Integer underflow in Frontier

Description

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.42%
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-cjg2-2fjg-fph4 third party advisory patch
https://github.com/paritytech/frontier/pull/549 third party advisory patch
https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-21685?
CVE-2022-21685 has been scored as a medium severity vulnerability.
How to fix CVE-2022-21685?
To fix CVE-2022-21685, 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-2022-21685 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-21685 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-2022-21685?
CVE-2022-21685 affects paritytech frontier.
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