111-1.txt

来自「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」· 文本 代码 · 共 64 行

Rule: 

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Sid: 
111-1

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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
a network scan is in progress. That is, a TCP datastream has been
detected that does not conform to normal activity.

An attacker may be able to determine the characteristics of a remote
system by sending abnormal network data. The response can reveal the
operating system type, indicate the presence of a firewall or show open
and closed ports on the host.

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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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