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  • [gentoo-announce] [ GLSA 202209-01 ] GNU Gzip, XZ Utils: Arbitrary file

    From glsamaker@gentoo.org@21:1/5 to All on Wed Sep 7 05:10:01 2022
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    Gentoo Linux Security Advisory GLSA 202209-01
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    https://security.gentoo.org/
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    Severity: High
    Title: GNU Gzip, XZ Utils: Arbitrary file write
    Date: September 07, 2022
    Bugs: #837152, #837155
    ID: 202209-01

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    Synopsis
    ========

    A vulnerability has been discovered in GNU Gzip and XZ Utils' grep
    helpers which could result in writes to arbitrary files.

    Background
    ==========

    GNU Gzip is a popular data compression program.

    XZ Utils is free general-purpose data compression software with a high compression ratio.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 app-arch/gzip < 1.12 >= 1.12
    2 app-arch/xz-utils < 5.2.5 >= 5.2.5

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

    GNU Gzip and XZ Utils' grep helpers do not sufficiently validate certain multi-line file names.

    Impact
    ======

    In some cases, writing to arbitrary files such as shell initialization files can be escalation to remote code execution.

    Workaround
    ==========

    Ensuring only trusted input is passed to GNU Gzip and XZ Utils' grep helpers minimizes the potential impact.

    Resolution
    ==========

    All GNU Gzip users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/gzip-1.12"

    All XZ Utils users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/xz-utils-5.2.5"

    References
    ==========

    [ 1 ] CVE-2022-1271
    https://nvd.nist.gov/vuln/detail/CVE-2022-1271

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

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

    https://security.gentoo.org/glsa/202209-01

    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 2022 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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