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Rule:
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Sid:
111-7
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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 scan is in progress. That is, packets with the SYN, ACK, 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 <roesch@sourcefire.com>
Sourcefire Vulnerability Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
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Additional References:
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