module

NTP Protocol Fuzzer

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Disclosed
N/A
Created
2018-05-30

Description

A simplistic fuzzer for the Network Time Protocol that sends the
following probes to understand NTP and look for anomalous NTP behavior:

* All possible combinations of NTP versions and modes, even if not
allowed or specified in the RFCs
* Short versions of the above
* Short, invalid datagrams
* Full-size, random datagrams
* All possible NTP control messages
* All possible NTP private messages

This findings of this fuzzer are not necessarily indicative of bugs,
let alone vulnerabilities, rather they point out interesting things
that might deserve more attention. Furthermore, this module is not
particularly intelligent and there are many more areas of NTP that
could be explored, including:

* Warn if the response is 100% identical to the request
* Warn if the "mode" (if applicable) doesn't align with what we expect,
* Filter out the 12-byte mode 6 unsupported opcode errors.
* Fuzz the control message payload offset/size/etc. There be bugs

Author

Jon Hart jon_hart@rapid7.com

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use auxiliary/fuzzers/ntp/ntp_protocol_fuzzer
    msf auxiliary(ntp_protocol_fuzzer) > show actions
        ...actions...
    msf auxiliary(ntp_protocol_fuzzer) > set ACTION < action-name >
    msf auxiliary(ntp_protocol_fuzzer) > show options
        ...show and set options...
    msf auxiliary(ntp_protocol_fuzzer) > run
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