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Rule:
--
Sid:
111-4
--
Summary:
This event is generated when the pre-processor stream4
detects network traffic that may constitute an attack.
--
Impact:
Unknown.
--
Detailed Information:
The pre-processor stream4 has detected network traffic that indicates
data has been found outside the expected window for the data in a session.
This is not normal network behavior and may indicate spurious activity
or a malfunctioning operating system network stack.
--
Affected Systems:
All systems
--
Attack Scenarios:
--
Ease of Attack:
Simple. Many automated packet generation tools exist.
--
False Positives:
None Known.
--
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.
--
Contributors:
Martin Roesch <roesch@sourcefire.com>
Sourcefire Vulnerability Research Team
Nigel Houghton <nigel.houghton@sourcefire.com>
--
Additional References:
--
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