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MSRC

ProbeForWrite

MS08-066 : Catching and fixing a ProbeForRead / ProbeForWrite bypass

Tuesday, October 14, 2008

The driver afd.sys is responsible for handling socket connections. MS08-066 addresses several vulnerabilities in afd.sys that could allow an attacker to execute arbitrary code in kernel mode. These vulnerabilities can only be exploited locally and there is no remote vector from our investigations. One of these vulnerabilities involves a ProbeForRead / ProbeForWrite bypass when using user supplied memory pointers and lengths.

MS08-025: Win32k vulnerabilities

Wednesday, April 09, 2008

MS08-025 addresses several vulnerabilities in win32k.sys where you can execute arbitrary code in kernel mode. These bugs can only be exploited locally and there is no remote vector we are aware of. One of these vulnerabilities deals on how we can bypass some of the ProbeForWrite and ProbeForRead checks when using user supplied memory pointers.