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    CVE-2024-37880

    The Kyber reference implementation before 9b8d306, when compiled by LLVM Clang through 18.x with some common optimization options, has a timing side channel that allows attackers to recover an ML-KEM 512 secret key in minutes. This occurs because poly_frommsg in poly.c does not prevent Clang from emitting a vulnerable secret-dependent branch.

    Published:Jun 10, 2024
    Last Modified:Nov 21, 2024
    EPS:Jun 10, 2024
    EPSS Score:0.00136
    CVSS Score:7.5

    Affected Products

    Vendor
    Pq-crystals
    Product
    Kyber

    Exploits

    https://github.com/antoonpurnal/clangoverhttps://pqshield.com/pqshield-plugs-timing-leaks-in-kyber-ml-kem-to-improve-pqc-implementation-maturity/https://twitter.com/purnaltoon/status/1797644696568959476https://github.com/antoonpurnal/clangoverhttps://pqshield.com/pqshield-plugs-timing-leaks-in-kyber-ml-kem-to-improve-pqc-implementation-maturity/https://twitter.com/purnaltoon/status/1797644696568959476

    Common Weakness Enumeration

    CWE-203 Observable Discrepancy

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-189 Black Box Reverse Engineering

    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