CVE-2017-7761

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    CVE-2017-7761

    Published: 11 Jun 2018Last Modified: 10 Mar 2026

    Summary:

    Details: The Mozilla Maintenance Service "helper.exe" application creates a temporary directory writable by non-privileged users. When this is combined with creation of a junction (a form of symbolic link), protected files in the target directory of the junction can be deleted by the Mozilla Maintenance Service, which has privileged access. Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox ESR < 52.2 and Firefox < 54.

    References: , https://www.mozilla.org/security/advisories/mfsa2017-16/, http://www.securityfocus.com/bid/99057, http://www.securitytracker.com/id/1038689, https://www.mozilla.org/security/advisories/mfsa2017-15/, https://bugzilla.mozilla.org/show_bug.cgi?id=1215648, https://sourceforge.net/p/nsis/bugs/1125/

    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