In anticipation of Dan Rosenberg’s talk on exploiting the Linux kernel’s SLOB memory allocator at the Infiltrate security conference and because I recently had a discussion with some friends about the different kernel memory allocators in Linux, I decided to write this quick introduction. I will present some of the allocators’ characteristics and also provide references to public work on exploitation techniques.
Black Hat Europe 2011 is now over and we are very happy to have participated once again in the best European IT security conference!
Continuing from our last year’s presentation, our talk this year focused on operating system kernel protections. Specifically, our researchers Patroklos Argyroudis and Dimitris Glynos collected their experiences from kernel exploit development and presented the ways in which modern operating systems protect their kernels from memory corruption attacks.
This article is a followup to our last year’s advisory on canary randomisation for applications of the Debian distribution.
I was recently asked what the currently employed method is for canary randomisation in SSP-armoured Linux applications. I’ve been meaning to write an article on this for some time now, but didn’t have the necessary time. So here it is (albeit a little late).
read more...| census ID: | census-2009-0005 |
| Affected Products: | Linux kernel versions from 2.6.32 to 2.6.32-rc7. |
| Class: | Off-by-two stack buffer overflow. |
| Discovered by: | Patroklos Argyroudis |
We have found an off-by-two stack buffer overflow in the Linux kernel SUNRPC implementation. Linux kernel versions from 2.6.32 to 2.6.32-rc7 are affected.
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