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0x05: Injecting Shellcode (Shellcraft/MSFVenom)
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https://youtu.be/4zut2Mjgh5M?si=jRGH_lL0RIcdTuhZ 5th video from the "Practical Buffer Overflow Exploitation" course covering the basics of Binary Exploitation. In this video we'll see what we can do with buffer overflows when there are no interesting local variables to overwrite, or functions to jump to (ret2win). Instead, we'll inject shellcode directly onto the stack and find a JMP ESP/RSP instruction to overwrite the return address and execute out own code. We'll use checksec, ghidra, pwndbg and create a couple of pwntools scripts, using both Shellcraft and MSFVenom to spawn a shell, cat the flag or create a reverse shell! Write-ups/tutorials aimed at beginners - Hope you enjoy 🙂 Find the binary files, source code and scripts to go with the series @https://github.com/Crypto-Cat/CTF/tree/main/pwn/binary_exploitation_101 ↢Binary Exploitation / Reverse Engineering↣ Pwn.College: https://pwn.college How2Heap: https://github.com/shellphish/how2heap NightMare: https://guyinatuxedo.github.io Ir0nstone: https://ir0nstone.gitbook.io/notes/types/stack PinkDraconian: https://youtube.com/playlist?list=PLeSXUd883dhjmKkVXSRgI1nJEZUDzgLf_ More: https://github.com/Crypto-Cat/CTF#readme ↢Resources↣ Ghidra: https://ghidra-sre.org/CheatSheet.html PwnTools: https://github.com/Gallopsled/pwntools-tutorial CyberChef: https://gchq.github.io/CyberChef HackTricks: https://book.hacktricks.xyz/exploiting/linux-exploiting-basic-esp GTFOBins: https://gtfobins.github.io Decompile Code: https://www.decompiler.com Run Code: https://tio.run
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0x07: Format String Vulnerabilities (printf)
0x03: Return to Win (Ret2Win)
0x06: Return to Lib-C (ret2system/one_gadget)
0x0A: Bypassing Stack Canaries (leak + write)
0x04: Ret2Win with Function Parameters (x86/x64)
0x01: Overwriting Variables on the Stack (pt 1)
0x08: Leak PIE (bypass) and Lib-C (ret2system)
0x09: Overwriting Global Offset Table (GOT) Entries with printf()
0x02: Overwriting Variables on the Stack (pt 2)
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