• [ GLSA 202105-31 ] Nettle: Denial of service

    From Thomas Deutschmann@21:1/5 to All on Wed May 26 12:30:01 2021
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    Gentoo Linux Security Advisory GLSA 202105-31
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    https://security.gentoo.org/
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    Severity: Low
    Title: Nettle: Denial of service
    Date: May 26, 2021
    Bugs: #780483
    ID: 202105-31

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    Synopsis
    ========

    A vulnerability in Nettle could lead to a Denial of Service condition.

    Background
    ==========

    Nettle is a cryptographic library that is designed to fit easily in
    almost any context: In cryptographic toolkits for object-oriented
    languages, such as C++, Python, or Pike, in applications like lsh or
    GnuPG, or even in kernel space.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 dev-libs/nettle < 3.7.2 >= 3.7.2

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

    It was discovered that Nettle incorrectly handled signature
    verification.

    Impact
    ======

    A remote attacker could send a specially crafted valid-looking input
    signature, possibly resulting in a Denial of Service condition or force
    an invalid signature.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Nettle users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.7.2"

    References
    ==========

    [ 1 ] CVE-2021-20305
    https://nvd.nist.gov/vuln/detail/CVE-2021-20305

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

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

    https://security.gentoo.org/glsa/202105-31

    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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