• [gentoo-announce] [ GLSA 202101-21 ] Flatpak: Sandbox escape

    From Aaron Bauman@21:1/5 to All on Mon Jan 25 01:20:01 2021
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    Gentoo Linux Security Advisory GLSA 202101-21
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    https://security.gentoo.org/
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    Severity: Normal
    Title: Flatpak: Sandbox escape
    Date: January 25, 2021
    Bugs: #765457
    ID: 202101-21

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    Synopsis
    ========

    A vulnerability was discovered in Flatpak which could allow a remote
    attacker to execute arbitrary code.

    Background
    ==========

    Flatpak is a Linux application sandboxing and distribution framework.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 sys-apps/flatpak < 1.10.0 >= 1.10.0

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

    A bug was discovered in the flatpak-portal service that can allow
    sandboxed applications to execute arbitrary code on the host system (a
    sandbox escape).

    Impact
    ======

    A remote attacker could entice a user to open a specially crafted
    Flatpak app possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

    Workaround
    ==========

    As a workaround, this vulnerability can be mitigated by preventing the flatpak-portal service from starting, but that mitigation will prevent
    many Flatpak apps from working correctly. It is highly recommended to
    upgrade.

    Resolution
    ==========

    All Flatpak users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/flatpak-1.10.0"

    References
    ==========

    [ 1 ] CVE-2021-21261
    https://nvd.nist.gov/vuln/detail/CVE-2021-21261

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

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

    https://security.gentoo.org/glsa/202101-21

    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 2021 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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