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XP/Vista IGMP Buffer Overflow — Explained

Posted by kdawson on from the that-didn't-take-long dept.

HalvarFlake writes "With all the hoopla about the remotely exploitable, kernel-level buffer overflow discussed in today's security bulletin MS08-0001, what is the actual bug that triggers this? The bulletin doesn't give all that much information. This movie (Flash required) goes through the process of examining the 'pre-patch' version of tcpip.sys and comparing it against the 'post-patch' version of tcpip.sys. This comparison yields the actual code that causes the overflow: A mistake in the calculation of the required size in a dynamic allocation."

3 of 208 comments (clear)

  1. well gee by sentientbrendan · · Score: 5, Funny

    >This comparison yields the actual code that causes the overflow:
    >A mistake in the calculation of the required size in a dynamic allocation

    I hope no one else makes this mistake.

  2. Dang it all. by palegray.net · · Score: 5, Funny

    Darn pesky kids and their fancy buffer overflows. I outta HEAP on the insults, but I'll try to stick to my PROGRAM of keeping my smoke STACK cool.

    --
    512 MB RAM, 20 GB disk, 200 GB transfer, five datacenters. $19.95/month.
    1. Re:Dang it all. by Anonymous Coward · · Score: 5, Funny

      You're PUSHing it. One more pun and I'll POP you in the mouth.