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    Gentoo: GLSA-202011-17: MIT Kerberos 5: Denial of service

    Date 15 Nov 2020
    2265
    Posted By LinuxSecurity Advisories
    A vulnerability in MIT Kerberos 5 could lead to a Denial of Service condition.
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    Gentoo Linux Security Advisory                           GLSA 202011-17
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                                               https://security.gentoo.org/
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     Severity: Low
        Title: MIT Kerberos 5: Denial of service
         Date: November 16, 2020
         Bugs: #753281
           ID: 202011-17
    
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    Synopsis
    ========
    
    A vulnerability in MIT Kerberos 5 could lead to a Denial of Service
    condition.
    
    Background
    ==========
    
    The MIT Kerberos 5 implementation provides a command line telnet client
    which is used for remote login via the telnet protocol.
    
    Affected packages
    =================
    
        -------------------------------------------------------------------
         Package              /     Vulnerable     /            Unaffected
        -------------------------------------------------------------------
      1  app-crypt/mit-krb5         < 1.18.2-r2              >= 1.18.2-r2 
    
    Description
    ===========
    
    It was discovered that MIT Kerberos network authentication system,
    krb5, did not properly handle ASN.1-encoded Kerberos messages.
    
    Impact
    ======
    
    A remote attacker could send a specially crafted Kerberos message,
    possibly resulting in a Denial of Service condition.
    
    Workaround
    ==========
    
    There is no known workaround at this time.
    
    Resolution
    ==========
    
    All MIT Kerberos 5 users should upgrade to the latest version:
    
      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.18.2-r2"
    
    References
    ==========
    
    [ 1 ] CVE-2020-28196
          https://nvd.nist.gov/vuln/detail/CVE-2020-28196
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
     https://security.gentoo.org/glsa/202011-17
    
    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 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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