Rule:

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Sid:
268

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Summary:
This event is generated when a remote attacker attempts to send large, fragmented IP packets to the internal network, indicating a Jolt Denial of Service (DoS) attack.

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Impact:
Denial of service.

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Detailed Information:
Jolt is a DoS attack characterized by large, fragmented IP packets that, when launched at a Windows system, can hang or crash the computer. 

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Affected Systems:
Windows 95
Windows 98
Windows NT
Windows 2000

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Attack Scenarios:
An attacker sends oversized, fragmented IP packets to a target computer. If the computer is running an unpatched version of Windows, it may crash.

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Ease of Attack:
Simple.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Install the latest patches available for your operating system.

Implement a packet-filtering firewall to block inappropriate traffic to the network.

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Contributors:
Original rule writer unknown
Sourcefire Research Team
Sourcefire Technical Publications Team
Jen Harvey <jennifer.harvey@sourcefire.com>

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Additional References:


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