111-6.txt

snort入侵检测规则文件2.4 Snort是众所周知的网络入侵检测工具

Rule: 

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Sid: 
111-6

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Summary: 
This event is generated when the pre-processor stream4
detects network traffic that may constitute an attack.

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Impact: 
This may indicate scanning activity.

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Detailed Information:
The pre-processor stream4 has detected network traffic that may indicate
an Xmas Tree scan is in progress. That is, packets with the FIN, URG and
PUSH flags set have been detected.

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Affected Systems:
	All systems

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Attack Scenarios: 
An attacker may utilize scanning techniques to determine possible points
of exploitation against a host.

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Ease of Attack: 
Simple. Many scanning tools exist.

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False Positives:
None Known.

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False Negatives:
None Known.

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Corrective Action:
Check the target host for signs of compromise.

Ensure the system is up to date with any appropriate vendor supplied patches.

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Contributors:
Martin Roesch <[e-mail]>
Sourcefire Vulnerability Research Team
Nigel Houghton <[e-mail]>

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Additional References:

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