SCO Experiences Distributed Denial of Service Attack

LINDON, Utah, Dec 10, 2003 -- The SCO Group, Inc., (Nasdaq: SCOX) the owner of the UNIX operating system, today confirmed that on Wednesday, December 10, 2003 at approximately 4:20 a.m. Mountain Time, it experienced a large scale distributed denial of service (DDoS) attack. The attack caused the company's Web site ( and corporate operational traffic to be unavailable during the morning hours including e-mail, the company intranet, and customer support operations. The company's Web site remains unavailable while this DDoS attack continues to take place. The company is working with its Internet Service Provider to restore to legitimate Internet users.

This specific type of DDoS attack, called a "syn attack," took place when several thousand servers were compromised by an unknown person to overload SCO's Web site with illegitimate Web site requests. The flood of traffic by these illegitimate requests caused the company's ISP's Internet bandwidth to be consumed so the Web site was inaccessible to any other legitimate Web user.

"SCO is working with law enforcement officials and gathering information through mechanisms that we have in place to help us identify the origin of these attacks," said company spokesperson, Blake Stowell. "We deplore these activities by those who try to intimidate or harass legitimate businesses through cyber terrorist tactics while hiding their true identity."

About The SCO Group

The SCO Group (Nasdaq: SCOX) helps millions of customers in more than 82 countries to grow their businesses everyday through business solutions. Headquartered in Lindon, Utah, SCO has a worldwide network of more than 11,000 resellers and 8,000 developers. SCO Global Services provides reliable localized support and services to all partners and customers. For more information on SCO products and services visit

SCO and the associated SCO logo are trademarks or registered trademarks of The SCO Group, Inc. in the U.S. and other countries. UNIX is a registered trademark of The Open Group in the United States and other countries. All other brand or product names are or may be trademarks of, and are used to identify products or services of, their respective owners.

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