Вход не для всех (Entry is not for everyone)

hackerlab

Task: Binary with login system using scanf("%176s") for password input. Solution: Buffer overflow overwrites adjacent is_logged variable on stack, bypassing authentication to get flag.

authentication_bypass elf64 static_analysis buffer_overflow stack_overflow variable_overwrite scanf_vulnerability objdump

Buffer overflow to overwrite adjacent stack variablescanf() buffer size mismatch exploitationInput buffer manipulation for menu selectionStatic binary analysis with objdump

$ ls tags/ techniques/

authentication_bypass elf64 static_analysis buffer_overflow stack_overflow variable_overwrite scanf_vulnerability objdump

Buffer overflow to overwrite adjacent stack variablescanf() buffer size mismatch exploitationInput buffer manipulation for menu selectionStatic binary analysis with objdump

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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