New sig for detecting NTPd DoS

[rmkml <rmkml () ligfy org>]

Hi,

Please check a new sig for detecting NTPd DoS:

alert udp $EXTERNAL_NET any -> $HOME_NET 123 (msg:"MISC Ntp v4.2.7.p22 / v4.3.0 DoS attempt"; dsize:1; content:"X"; 
reference:cve,2016-7434; 
reference:url,cxsecurity.com/issue/WLB-2016110197; classtype:attempted-dos; sid:1; rev:1; )

Don't forget check variables.

Please send any comments.

Regards
@Rmkml

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