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  • [gentoo-announce] [ GLSA 202009-02 ] Dovecot: Multiple vulnerabilities

    From Thomas Deutschmann@21:1/5 to All on Sun Sep 6 02:40:01 2020
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    Gentoo Linux Security Advisory GLSA 202009-02
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    https://security.gentoo.org/
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    Severity: Normal
    Title: Dovecot: Multiple vulnerabilities
    Date: September 06, 2020
    Bugs: #736617
    ID: 202009-02

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    Synopsis
    ========

    Multiple vulnerabilities have been found in Dovecot, the worst of which
    could allow remote attackers to cause a Denial of Service condition.

    Background
    ==========

    Dovecot is an open source IMAP and POP3 email server.

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

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 net-mail/dovecot < 2.3.11.3 >= 2.3.11.3

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

    It was discovered that Dovecot incorrectly handled deeply nested MIME
    parts, incorrectly handled memory when using NTLM, and incorrectly
    handled zero-length messages.

    Impact
    ======

    A remote attacker could send a specially crafted mail or send specially
    crafted authentication requests possibly resulting in a Denial of
    Service condition.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Dovecot users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/dovecot-2.3.11.3"

    References
    ==========

    [ 1 ] CVE-2020-12100
    https://nvd.nist.gov/vuln/detail/CVE-2020-12100
    [ 2 ] CVE-2020-12673
    https://nvd.nist.gov/vuln/detail/CVE-2020-12673
    [ 3 ] CVE-2020-12674
    https://nvd.nist.gov/vuln/detail/CVE-2020-12674

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

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

    https://security.gentoo.org/glsa/202009-02

    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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