In this post I’ll show you how to port the ret2csu technique on ARM binaries. This technique allows full ASLR bypass using ROP gadgets inside the binary only. We will see that it also turns out to be a very effective technique to easily chain ROP gadgets.
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Recently the Qualys Research Team did an amazing job discovering a Heap overflow vulnerability in Sudo. In the next sections, we will analyze the bug and we will write an exploit to gain root privileges on Debain 10.
Rope2 by R4J has been my favorite box on HackTheBox by far. It wasn’t really related to pentesting, but was an immersive exploit dev experience