Gentoo: GLSA-201911-01: OpenSSH: Integer overflow

    Date 07 Nov 2019
    2906
    Posted By LinuxSecurity Advisories
    An integer overflow in OpenSSH might allow an attacker to execute arbitrary code.
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Gentoo Linux Security Advisory                           GLSA 201911-01
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                               https://security.gentoo.org/
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
     Severity: Normal
        Title: OpenSSH: Integer overflow
         Date: November 07, 2019
         Bugs: #697046
           ID: 201911-01
    
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    
    Synopsis
    ========
    
    An integer overflow in OpenSSH might allow an attacker to execute
    arbitrary code.
    
    Background
    ==========
    
    OpenSSH is a complete SSH protocol implementation that includes SFTP
    client and server support.
    
    Affected packages
    =================
    
        -------------------------------------------------------------------
         Package              /     Vulnerable     /            Unaffected
        -------------------------------------------------------------------
      1  net-misc/openssh           >= 8.0_p1-r2             >= 8.0_p1-r4 
    
    Description
    ===========
    
    OpenSSH, when built with "xmss" USE flag enabled, has a
    pre-authentication integer overflow if a client or server is configured
    to use a crafted XMSS key.
    
    NOTE: This USE flag is disabled by default!
    
    Impact
    ======
    
    A remote attacker could connect to a vulnerable OpenSSH server using a
    special crafted XMSS key possibly resulting in execution of arbitrary
    code with the privileges of the process or a Denial of Service
    condition.
    
    Workaround
    ==========
    
    Disable XMSS key type.
    
    Resolution
    ==========
    
    All OpenSSH users should upgrade to the latest version:
    
      # emerge --sync
      # emerge --ask --oneshot -v ">=net-misc/openssh/openssh-8.0_p1-r4"
    
    References
    ==========
    
    [ 1 ] CVE-2019-16905
          https://nvd.nist.gov/vuln/detail/CVE-2019-16905
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
     https://security.gentoo.org/glsa/201911-01
    
    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
    This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at
    https://bugs.gentoo.org.
    
    License
    =======
    
    Copyright 2019 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
    
    

    LinuxSecurity Poll

    Do you feel that the Lawful Access to Encrypted Data Act, which aims to force encryption backdoors, is a threat to US citizens' privacy?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/30-do-you-feel-that-the-lawful-access-to-encrypted-data-act-which-aims-to-force-encryption-backdoors-is-a-threat-to-privacy?task=poll.vote&format=json
    30
    radio
    [{"id":"106","title":"Yes - I am a privacy advocate and I am strongly opposed to this bill.","votes":"23","type":"x","order":"1","pct":95.83,"resources":[]},{"id":"107","title":"I'm undecided - it has its pros and cons.","votes":"1","type":"x","order":"2","pct":4.17,"resources":[]},{"id":"108","title":"No - I support this bill and feel that it will help protect against crime and threats to our national security. ","votes":"0","type":"x","order":"3","pct":0,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
    bottom 200

    Advisories

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.