UBUNTU-CVE-2016-2821

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    UBUNTU-CVE-2016-2821

    Published: 8 Jun 2016Last Modified: 22 Apr 2026
    Upstream:
    CVE-2016-2821
    Aliases:
    USN-2993-1

    Summary:

    Details: Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

    References: https://ubuntu.com/security/CVE-2016-2821, https://www.mozilla.org/en-US/security/advisories/mfsa2016-51/, https://ubuntu.com/security/notices/USN-2993-1, https://www.cve.org/CVERecord?id=CVE-2016-2821

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build3-0ubuntu0.14.04.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -47.0+build3-0ubuntu0.14.04.1

    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
    UBUNTU-CVE-2016-2821 | CVE-DB