Player2 was a challenging but very fun box by MrR3boot and b14ckh34rt. The highlight of the box for me is the finale 2.29 heap pwn! In my opinion, if there were no unintended routes, this would have been by far the hardest box so far, but some of these alternative solutions were never patched.
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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