Vulnerability · Published Jan 14, 2022 · Assigned by GitHub_M

CVE-2022-21685Integer underflow in Frontier

Medium 6.5

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 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)1.3%top 28.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
paritytech	frontier	< 8a93fdc

Weakness: CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/paritytech/frontier/security/advisories/GHSA-cjg2-2fjg-fph4 x_refsource_CONFIRM
https://github.com/paritytech/frontier/pull/549 x_refsource_MISC
https://github.com/paritytech/frontier/commit/8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664 x_refsource_MISC