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    CVE-2018-12379

    When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.

    Published:Sep 5, 2018
    Last Modified:Nov 25, 2025
    EPS:Oct 18, 2018
    EPSS Score:0.00098
    CVSS Score:7.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://www.securityfocus.com/bid/105280
    http://www.securitytracker.com/id/1041610
    https://access.redhat.com/errata/RHSA-2018:2692
    https://access.redhat.com/errata/RHSA-2018:2693
    https://access.redhat.com/errata/RHSA-2018:3403
    https://access.redhat.com/errata/RHSA-2018:3458
    https://bugzilla.mozilla.org/show_bug.cgi?id=1473113
    https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
    https://security.gentoo.org/glsa/201810-01
    https://security.gentoo.org/glsa/201811-13
    https://www.debian.org/security/2018/dsa-4327
    https://www.mozilla.org/security/advisories/mfsa2018-20/
    https://www.mozilla.org/security/advisories/mfsa2018-21/
    https://www.mozilla.org/security/advisories/mfsa2018-25/
    http://www.securityfocus.com/bid/105280
    http://www.securitytracker.com/id/1041610
    https://access.redhat.com/errata/RHSA-2018:2692
    https://access.redhat.com/errata/RHSA-2018:2693
    https://access.redhat.com/errata/RHSA-2018:3403
    https://access.redhat.com/errata/RHSA-2018:3458
    https://bugzilla.mozilla.org/show_bug.cgi?id=1473113
    https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
    https://security.gentoo.org/glsa/201810-01
    https://security.gentoo.org/glsa/201811-13
    https://www.debian.org/security/2018/dsa-4327
    https://www.mozilla.org/security/advisories/mfsa2018-20/
    https://www.mozilla.org/security/advisories/mfsa2018-21/
    https://www.mozilla.org/security/advisories/mfsa2018-25/

    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