DW still vulnerable on anti-TOCTTOU BY mj0011

Singlemature at 17h41
06
Jul
2010
DW still vulnerable on anti-TOCTTOU BY mj0011

link here:http://bbs.kafan.cn/thread-740802-1-1.html

Strong anti-TOCTTOU (race conditions) protection is integrated into.

====

这句说得就有点过分了,新版的DW确实运用了一些技术来防止TOCTTOU(即所谓KHOBE), 主要表现在下面两个方面:
(1).对于用户地址的参数,申请kernel内存并通过MmMapLockedPagesSpecifyCache映射到用户态地址上,然后将参数COPY该地址后,直接将映射后的地址传递给R0

(2).对于句柄,在所有句柄创建、关闭时记录其对象和句柄一个进程对应的链表中,当句柄使用时,检查是否位于这个表中,如果发现send-close-creat
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06/07/2010 at 17h41 by "Singlemature"