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  • RHEL 7.4 and ntpq noquery

    Posted on

    This week I noticed you can pass a network time protocol query read variable to a RHEL 7 OS despite the /etc/ntp.conf restrict noquery. I get that ntpd versions prior to 4.2.7 are vulnerable by default, but if you're still on 4.2.6 are there options available?

    ntpq -c rv [ip addr]
    
    ntpd --version
    

    Links
    Open NTP Version (Mode 6) Scanning Project
    NTP Amplification Attacks Using CVE-2013-5211

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