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Old 08-01-2009, 03:51 PM   #1
LXer
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LXer: This week at LWN: Fun with NULL pointers, part 2


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Fun with NULL pointers, part 1 took a detailed look at the long chain of failures which allowed the kernel to be compromised by way of a NULL pointer dereference. Eliminating that particular bug was a straightforward fix; it was, in fact, fixed before the nature of the vulnerability was widely understood. The importance of this particular problem is, in one sense, relatively small; there are very few distributions which shipped vulnerable versions of the kernel. But this exploit suggests that there could be a whole class of related problems in the kernel; there is a definite chance that similar vulnerabilities could be discovered - if, indeed, they have not already been found.

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