A new worm that propagates by exploiting security vulnerabilities in Web server software is <A HREF="http://news.zdnet.com/2100-1009_22-5938475.html?tag=nl.e589">attacking Linux systems.</A> The worm spreads by exploiting Web servers that host susceptible scripts at specific locations, according to antivirus software maker McAfee, which has named the worm "Lupper." Lupper blindly attacks Web servers, installing and executing a copy of the worm when a vulnerable server is found, McAfee said in its description of the worm.