GitHub Advisoryadvisory · Go

GHSA-2x5j-vhc8-9cwm CIRCL-Fourq: Missing and wrong validation can lead to incorrect results

LOW Published 2025-06-10 Modified 2025-10-23 Official page ↗
Aliases
CVE-2025-8556
Ecosystem
Go
Packages
github.com/cloudflare/circl
Severity
Low
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-20, CWE-347
Reviewed
2025-06-10

Affected packages

• Go github.com/cloudflare/circl: < 1.6.1 → fixed in 1.6.1

Description

Impact The CIRCL implementation of FourQ fails to validate user-supplied low-order points during Diffie-Hellman key exchange, potentially allowing attackers to force the identity point and compromise session security. Moreover, there is an incorrect point validation in ScalarMult can lead to incorrect results in the isEqual function and if a point is on the curve. Patches Version 1.6.1 (https://github.com/cloudflare/circl/tree/v1.6.1) mitigates the identified issues. We acknowledge Alon Livne (Botanica Software Labs) for the reported findings.

Related

Alias · CVE (1)

  • CVE-2025-8556 A flaw was found in CIRCL's implementation of the FourQ elliptic curve. vulnerability

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-347 Improper Verification of Cryptographic Signature weakness

References