UBUNTU-CVE-2017-7793

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    UBUNTU-CVE-2017-7793

    Published: 2 Oct 2017Last Modified: 22 Apr 2026
    Upstream:
    CVE-2017-7793

    Summary:

    Details: A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

    References: https://ubuntu.com/security/CVE-2017-7793, https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/, https://ubuntu.com/security/notices/USN-3435-1, https://ubuntu.com/security/notices/USN-3436-1, https://www.cve.org/CVERecord?id=CVE-2017-7793

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build6-0ubuntu0.14.04.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -56.0+build6-0ubuntu0.14.04.1

    Affected versions

    24.0+build1-0ubuntu1

    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