Ubuntu 3707-2: NTP vulnerabilities

    Date 23 Jan 2019
    3164
    Posted By Anthony Pell
    Several security issues were fixed in NTP.
    ==========================================================================
    Ubuntu Security Notice USN-3707-2
    January 23, 2019
    
    ntp vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in NTP.
    
    Software Description:
    - ntp: Network Time Protocol daemon and utility programs
    
    Details:
    
    USN-3707-1 and USN-3349-1 fixed several vulnerabilities in NTP. This
    update provides the corresponding update for Ubuntu 12.04 ESM.
    
    Original advisory details:
    
     Miroslav Lichvar discovered that NTP incorrectly handled certain
     spoofed addresses when performing rate limiting. A remote attacker
     could possibly use this issue to perform a denial of service.
     (CVE-2016-7426)
    
     Matthew Van Gundy discovered that NTP incorrectly handled certain
     crafted broadcast mode packets. A remote attacker could possibly use
     this issue to perform a denial of service. 
     (CVE-2016-7427, CVE-2016-7428)
    
     Matthew Van Gundy discovered that NTP incorrectly handled certain
     control mode packets. A remote attacker could use this issue to set or
     unset traps. (CVE-2016-9310)
    
     Matthew Van Gundy discovered that NTP incorrectly handled the trap
     service. A remote attacker could possibly use this issue to cause NTP
     to crash, resulting in a denial of service. (CVE-2016-9311)
    
     It was discovered that the NTP legacy DPTS refclock driver incorrectly
     handled the /dev/datum device. A local attacker could possibly use
     this issue to cause a denial of service. (CVE-2017-6462)
    
     It was discovered that NTP incorrectly handled certain invalid
     settings in a :config directive. A remote authenticated user could
     possibly use this issue to cause NTP to crash, resulting in a denial
     of service. (CVE-2017-6463)
    
     Michael Macnair discovered that NTP incorrectly handled certain
     responses. A remote attacker could possibly use this issue to execute
     arbitrary code. (CVE-2018-7183)
    
     Miroslav Lichvar discovered that NTP incorrectly handled certain
     zero-origin timestamps. A remote attacker could possibly use this
     issue to cause a denial of service. (CVE-2018-7185)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      ntp                             1:4.2.6.p3+dfsg-1ubuntu3.12
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3707-2
      https://usn.ubuntu.com/usn/usn-3707-1
      CVE-2016-7426, CVE-2016-7427, CVE-2016-7428, CVE-2016-9310,
      CVE-2016-9311, CVE-2017-6462, CVE-2017-6463, CVE-2018-7183,
      CVE-2018-7185
    

    LinuxSecurity Poll

    If you are using full-disk encryption: are you concerned about the resulting performance hit?

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    /main-polls/34-if-you-are-using-full-disk-encryption-are-you-concerned-about-the-resulting-performance-hit?task=poll.vote&format=json
    34
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    [{"id":"120","title":"Yes","votes":"10","type":"x","order":"1","pct":71.43,"resources":[]},{"id":"121","title":"No ","votes":"4","type":"x","order":"2","pct":28.57,"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
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