• [ GLSA 202105-09 ] BusyBox: Denial of service

    From Thomas Deutschmann@21:1/5 to All on Wed May 26 10:50:01 2021
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    Gentoo Linux Security Advisory GLSA 202105-09
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    https://security.gentoo.org/
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    Severity: Low
    Title: BusyBox: Denial of service
    Date: May 26, 2021
    Bugs: #777255
    ID: 202105-09

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    Synopsis
    ========

    A vulnerability in BusyBox might allow remote attackers to cause a
    Denial of Service condition.

    Background
    ==========

    BusyBox is a set of tools for embedded systems and is a replacement for
    GNU Coreutils.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 sys-apps/busybox < 1.32.1 >= 1.32.1

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

    It was discovered that BusyBox mishandled the error bit on the
    huft_build result pointer when decompressing GZIP compressed data.

    Impact
    ======

    A remote attacker could entice a user to open a specially crafted GZIP
    file using BusyBox, possibly resulting in a Denial of Service
    condition.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All BusyBox users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/busybox-1.32.1"

    References
    ==========

    [ 1 ] CVE-2021-28831
    https://nvd.nist.gov/vuln/detail/CVE-2021-28831

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

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

    https://security.gentoo.org/glsa/202105-09

    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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