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  5. CVE-2020-26265

CVE-2020-26265: Incorrect Calculation

June 29, 2021

Go Ethereum, or “Geth”, is the official Golang implementation of the Ethereum protocol. In Geth from version 1.9.4 and before version 1.9.20 a consensus-vulnerability could cause a chain split, where vulnerable versions refuse to accept the canonical chain. The fix was included in the Paragade release version 1.9.20. No individual workaround patches have been made – all users are recommended to upgrade to a newer version.

References

  • github.com/advisories/GHSA-xw37-57qp-9mm4
  • github.com/ethereum/go-ethereum/pull/21409
  • github.com/ethereum/go-ethereum/releases/tag/v1.9.20
  • github.com/ethereum/go-ethereum/security/advisories/GHSA-xw37-57qp-9mm4
  • nvd.nist.gov/vuln/detail/CVE-2020-26265

Code Behaviors & Features

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Affected versions

All versions starting from 1.9.4 before 1.9.20

Fixed versions

  • 1.9.20

Solution

Upgrade to version 1.9.20 or above.

Impact 5.3 MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Learn more about CVSS

Weakness

  • CWE-682: Incorrect Calculation
  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Source file

go/github.com/ethereum/go-ethereum/core/CVE-2020-26265.yml

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