UBUNTU-CVE-2021-23977

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    UBUNTU-CVE-2021-23977

    Published: 26 Feb 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-23977

    Summary:

    Details: Firefox for Android suffered from a time-of-check-time-of-use vulnerability that allowed a malicious application to read sensitive data from application directories. Note: This issue is only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 86.

    References: https://ubuntu.com/security/CVE-2021-23977, https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23977, https://bugzilla.mozilla.org/show_bug.cgi?id=1684761, https://www.mozilla.org/security/advisories/mfsa2021-07/, https://www.cve.org/CVERecord?id=CVE-2021-23977

    Affected packages

    Package

    Name: mozjs52

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    52.3.1-0ubuntu3
    52.3.1-7fakesync1

    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-2021-23977 | CVE-DB