CVE-2022-21685CWE-191

Integer underflow in Frontier

Medium · published January 14, 2022

CVSS v3.1
6.5
EPSS
1%
Percentile
70.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01331 · 70.9th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2022-01-14T17:05Z
EPSS history
Timeline
  • 14 JAN 17:05Z
    Integer underflow in Frontier
    cvelistv5