CVE-2019-9815

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    CVE-2019-9815

    Published: 23 Jul 2019Last Modified: 10 Mar 2026

    Summary:

    Details: If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks. Apple has shipped macOS 10.14.5 with an option to disable hyperthreading in applications running untrusted code in a thread through a new sysctl. Firefox now makes use of it on the main thread and any worker threads. *Note: users need to update to macOS 10.14.5 in order to take advantage of this change.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

    References: , https://mdsattacks.com/, https://www.mozilla.org/security/advisories/mfsa2019-13/, https://www.mozilla.org/security/advisories/mfsa2019-14/, https://www.mozilla.org/security/advisories/mfsa2019-15/, https://bugzilla.mozilla.org/show_bug.cgi?id=1546544

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    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