• [gentoo-announce] [ GLSA 202011-07 ] Mozilla Firefox: Remote code execu

    From Sam James@21:1/5 to All on Wed Nov 11 05:00:01 2020
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    Gentoo Linux Security Advisory GLSA 202011-07
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    https://security.gentoo.org/
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    Severity: Normal
    Title: Mozilla Firefox: Remote code execution
    Date: November 11, 2020
    Bugs: #753773
    ID: 202011-07

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    Synopsis
    ========

    A use-after-free in Mozilla Firefox might allow remote attacker(s) to
    execute arbitrary code.

    Background
    ==========

    Mozilla Firefox is a popular open-source web browser from the Mozilla
    project.

    Affected packages
    =================

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 www-client/firefox < 82.0.3 >= 78.4.1:0/esr78
    >= 82.0.3
    2 www-client/firefox-bin < 78.4.1 >= 78.4.1:0/esr78
    >= 82.0.3
    -------------------------------------------------------------------
    2 affected packages

    Description
    ===========

    Invalid assumptions when emitting the the MCallGetProperty opcode in
    the JavaScript JIT may result in a use-after-free condition.

    Impact
    ======

    A remote attacker could possibly execute arbitrary code with the
    privileges of the process, or cause a Denial of Service condition.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Mozilla Firefox users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3"

    All Mozilla Firefox (bin) users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot -v ">=www-client/firefox-bin-78.4.1:0/esr78"

    All Mozilla Firefox (ESR) users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-client/firefox-82.0.3"

    All Mozilla Firefox (ESR) bin users should upgrade to the latest
    version:

    # emerge --sync
    # emerge --ask --oneshot -v ">=www-client/firefox-bin-78.4.1:0/esr78"

    References
    ==========

    [ 1 ] CVE-2020-26950
    https://nvd.nist.gov/vuln/detail/CVE-2020-26950
    [ 2 ] MFSA-2020-49
    https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/

    Availability
    ============

    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:

    https://security.gentoo.org/glsa/202011-07

    Concerns?
    =========

    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users' machines is of utmost
    importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

    License
    =======

    Copyright 2020 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).

    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.

    https://creativecommons.org/licenses/by-sa/2.5


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