1133.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:

1133

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Summary:
This event is generated when the Cybercop vulnerability scanner is used 
against a host.

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Impact:
Cybercop can be used to identify vulnerabilities on host systems.

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Detailed Information:

This particular packet is a part of Cybercop's OS identification.  
Specially crafted packets are able to elicit different responses from 
different operating systems.  This packet is likely to be part of a full
Cybercop scan rather than an isolated event. 

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Affected Systems:

All

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Attack Scenarios:
Cybercop can be used by attackers to determine vulnerabilities present 
on a host or network of hosts that could be used as attack vectors.

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Ease of Attack:
Simple

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False Positives:
This tool can be used legitimately by system and network administrators.
Other vulnerability scanners may display the same behavior.

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False Negatives:

None known.
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Corrective Action:
TCP packets with SYN, FIN and PUSH set at the same time are abnormal, 
use a packet filtering firewall to block them.

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Contributors:
Sourcefire Research Team
Brian Caswell <[e-mail]>
Nigel Houghton <[e-mail]>
Snort documentation contributed by Steven Alexander<[e-mail]>

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Additional References:

Arachnids:
http://www.whitehats.com/info/IDS145

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