DEBIAN-CVE-2021-23995

    Dashboard / Vulnerabilities / DEBIAN-CVE-2021-23995

    DEBIAN-CVE-2021-23995

    Published: 24 Jun 2021Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-23995

    Summary:

    Details: When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

    References: https://security-tracker.debian.org/tracker/CVE-2021-23995

    Affected packages

    Package

    Name: firefox-esr

    Purl: pkg:deb/debian/firefox-esr?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -78.10.0esr-1

    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
    DEBIAN-CVE-2021-23995 | CVE-DB