GHSA-2x5j-vhc8-9cwm

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    GHSA-2x5j-vhc8-9cwm

    Published: 10 Jun 2025Last Modified: 10 Sept 2026

    Summary: CIRCL-Fourq: Missing and wrong validation can lead to incorrect results

    Details: ### 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.

    References: https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm, https://nvd.nist.gov/vuln/detail/CVE-2025-8556, https://access.redhat.com/security/cve/CVE-2025-8556, https://bugzilla.redhat.com/show_bug.cgi?id=2371624, https://github.com/cloudflare/circl, https://github.com/cloudflare/circl/tree/v1.6.1, https://news.ycombinator.com/item?id=45669593, https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation

    Affected packages

    Package

    Name: github.com/cloudflare/circl

    Purl: pkg:golang/github.com/cloudflare/circl

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.6.1

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-2x5j-vhc8-9cwm | CVE-DB