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Symmetry And Group

P. Eymard, J. Faraut, G. Schiffmann, R. Takahashi's Analyse Harmonique sur les Groupes de Lie II PDF

By P. Eymard, J. Faraut, G. Schiffmann, R. Takahashi

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Also known as Sapphire, the worm exploits a weakness in the Microsoft Structured Query Language (SQL) server. It sends a 376-byte User Datagram Protocol (UDP) packet to port 1434, overflows a buffer on the SQL server, and gains SYSTEM privileges, the highest possible level of compromise on a Windows operating system. Once it has successfully compromised a host, it starts scanning other IP addresses to further spread. OINK! Worms that use multiple attack paths are an excellent example of the value of correlation.

OINK! The CERT/CC is a center of Internet security expertise located at the Software Engineering Institute, a federally funded research and develop­ ment center operated by Carnegie-Mellon University. So, what’s a good candidate rule for catching this with an IDS? Obviously, this is just the type of activity that you want to detect on your network. One thing common among every Slammer-infected host is the exploit payload it sends out. And indeed, that’s exactly what the Snort IDS signature for the rule matches against.

If you do, it is an attack. ”The problem is that while protocols are tightly and clearly defined, not all vendors choose to pay attention to everything in the protocol definition. As a result, you may find that your protocol analysis-based IDS is correctly complaining about something that is not allowed in the RFC (Request For Comments—the documents used to define most Internet protocols. org) but is completely normal for applications from a specific vendor. This means that most vendors tend to be very unwilling to share their protocol models openly, even with customers.

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