Cyber Resilience

CVE-2022-21685

Medium

Published: 14 January 2022

Published
14 January 2022
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0044 63.7th percentile
Risk Priority 13 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-21685 is a medium-severity Wrap or Wraparound (CWE-191) vulnerability in Parity Frontier. Its CVSS base score is 6.5 (Medium).

Operationally, ranked in the top 36.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

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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.

CWE(s)
CWE-191

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

parity
frontier
≤ 2022-01-13

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References