From: Coolio [coolio@K-R4D.COM] Sent: Saturday, July 03, 1999 8:56 PM To: BUGTRAQ@NETSPACE.ORG Subject: IGMP fragmentation bug in Windows 98/2000 Windows 98's TCP/IP stack chokes on fragmented IGMP packets. There is an exploit out there called "fawx" that supposedly exploits this problem, but I haven't had any success crashing Windows with it. Recently I was given source to a program that reliably crashed Win98/98SE/2000 build 2000 and challenged my friend defile to see who could write a version of it utilizing handcrafted igmp/ip headers for source spoofing support. Here is the resulting code that works against most systems with one or two tries.