UBUNTU-CVE-2021-38492

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    UBUNTU-CVE-2021-38492

    Published: 3 Nov 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-38492

    Summary:

    Details: When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

    References: https://ubuntu.com/security/CVE-2021-38492, https://www.mozilla.org/en-US/security/advisories/mfsa2021-42/#CVE-2021-38492, https://www.mozilla.org/en-US/security/advisories/mfsa2021-39/#CVE-2021-38492, https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38492, https://access.redhat.com/security/cve/CVE-2021-38492, https://www.cve.org/CVERecord?id=CVE-2021-38492

    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-2021-38492 | CVE-DB