Note: ce post est disponible en français sur le microblog nibbles.

This challenge was a heap overflow on linux. The glibc version was 2.7. We were not given the source code, but thanks to hex-rays, we had a good idea of what the code looked like. The vulnerable program printed some informations to make exploitation easier: "good heap allignment found on malloc() [somenumber]". We searched this sentence on the web and found this article. As we suspected, we were going to have to use the "House of Mind" technique. It seems that the code source of this challenge was ...

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