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www.hackthebox.com
| | www.willsroot.io
2.5 parsecs away

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| | Vulnerability Research on Low-Level Systems
| | syst3mfailure.io
2.5 parsecs away

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| | Wall of Perdition is the second and harder part of a two part series of kernel exploitation challenges designed by FizzBuzz101 and me for corCTF 2021. You can find the writeup for the first part, Fire of Salvation, on his blog. Unfortunately, both challenges during competition remained unsolved. Wall of Perdition consists of a vulnerable Linux Kernel Module, the bug is a 0x30 bytes Use After Free Write in kmalloc-64. With this challenge, we present a new approach to transform the Linux kernel's IPC mechanism, more specifically, message operations, in an exploitation toolkit. Let's get started!
| | duasynt.com
1.6 parsecs away

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| | Universal Linux kernel heap spray
| | blog.lexfo.fr
35.0 parsecs away

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| The first article covers an in-depth CVE/bug analysis, designs an attack scenario and starts implementing a PoC in ring-0 with SystemTap. The core concept section focuses on file/socket related data structures, netlink and refcounters.