Snort mailing list archives

BAD TRAFFIC bad frag bits


From: Clayton Mascarenhas <masclaythesnort () yahoo com>
Date: Thu, 27 Mar 2003 15:41:58 -0800 (PST)


Hi list,

 

I got this "Bad traffic bad frag bits" alert. 

 

03/20-01:00:09.476681 [**] [1:1322:4] BAD TRAFFIC bad frag bits [**] [Classification: Misc activity] [Priority: 3] 
{UDP} 2.3.4.5 -> 1.2.3.4

 

This comes when the Dont Fragment and More fragment bits are set. When will this situation occur?? In the alert shown 
what could possibly make the 2.3.4.5 machine send such a packet to 1.2.3.4? And why would an attacker want to craft 
such a packet when it actually doesnt help the attacker in any way?

 

Thanks in advance.



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