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Windows System Exploit

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Re: Windows System Exploit

#12

Earlier quoted context omitted.

Agreed. Raymond Chen refers to these types of problems as involving "being on the other side of this airtight hatchway": http://blogs.msdn.com/b/oldnewthing/archive/2010/05/11/10009...

That's not entirely true - non-privileged local users are not supposed to be able to bluescreen the system. Note that, e.g. Terminal Server exists.

You can cause a blue screen by trying to copy the device context of the screen to itself with BitBlt - a stupid thing to do but still causes a blue screen

Re: Windows System Exploit

#14
Untill proven otherwise this totally violates full Disclosure policies. I know they are like 'gentleman agreements' but this feels bad, and looks bad, like the author is only out for some internet fame. I can not believe that he in any way tried to contact Microsoft, but clearly took his time on this publication.

Re: Windows System Exploit

#15
Untill proven otherwise this totally violates full Disclosure policies. I know they are like 'gentleman agreements' but this feels bad, and looks bad, like the author is only out for some internet fame. I can not believe that he in any way tried to contact Microsoft, but clearly took his time on this publication.

Re: Windows System Exploit

#16
post #13

I think this it utterly irresponsible to publish without trying to contact Microsoft's security team first. Why on earth?

They don't have a vulnerability reward program, so why on earth would you?

So you're saying you should only do the right thing if there's something in it for you?

Re: Windows System Exploit

#17

Untill proven otherwise this totally violates full Disclosure policies. I know they are like 'gentleman agreements' but this feels bad, and looks bad, like the author is only out for some internet fame. I can not believe that he in any way tried to contact Microsoft, but clearly took his time on this publication.

I kind of get the feeling that the author doesn't really know what he's doing. The actual exploit code is a fragment of what looks like a 'hello world' sort of console IO test. The 0xC0000000 he goes on and on about is just GENERIC_READ | GENERIC_WRITE, which is a totally legal combination. And he disassembles his own code for no particularly good reason.

Given all of this, it's not really a surprise that he's not clear on responsible disclosure policies (this doesn't really violate 'full disclosure policies' - he's fully disclosing it, after all!). It sounds like he was just playing around with things, found a way to crash his own machine by accident, and decided to post it online.

I also note that the code is incomplete, and looks reasonably straightforward and correct from casual inspection. I wonder if the real cause is elsewhere?

Re: Windows System Exploit

#18
post #13

Earlier quoted context omitted.

They don't have a vulnerability reward program, so why on earth would you?

So you're saying you should only do the right thing if there's something in it for you?

It's probably a better incentive than getting nothing back :-)

Re: Windows System Exploit

#20
post #12

Earlier quoted context omitted.

That's not entirely true - non-privileged local users are not supposed to be able to bluescreen the system. Note that, e.g. Terminal Server exists.

You can cause a blue screen by trying to copy the device context of the screen to itself with BitBlt - a stupid thing to do but still causes a blue screen

Sounds interesting. Anyone else have evidence for Microsoft's policy of ignoring local DoS vulns?
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