CVE-2016-5284

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    CVE-2016-5284

    Published: 22 Sept 2016Last Modified: 16 Apr 2026

    Summary:

    Details: Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 rely on unintended expiration dates for Preloaded Public Key Pinning, which allows man-in-the-middle attackers to spoof add-on updates by leveraging possession of an X.509 server certificate for addons.mozilla.org signed by an arbitrary built-in Certification Authority.

    References: http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html, http://www.securitytracker.com/id/1036852, http://www.securityfocus.com/bid/93049, http://rhn.redhat.com/errata/RHSA-2016-1912.html, http://seclists.org/dailydave/2016/q3/51, http://www.debian.org/security/2016/dsa-3674, http://www.mozilla.org/security/announce/2016/mfsa2016-85.html, https://blog.mozilla.org/security/2016/09/16/update-on-add-on-pinning-vulnerability/, https://security.gentoo.org/glsa/201701-15, https://www.mozilla.org/security/advisories/mfsa2016-86/, https://www.mozilla.org/security/advisories/mfsa2016-88/, https://bugzilla.mozilla.org/show_bug.cgi?id=1303127, https://hackernoon.com/tor-browser-exposed-anti-privacy-implantation-at-mass-scale-bd68e9eb1e95

    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
    CVE-2016-5284 | CVE-DB