Clear it in 3 steps
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Start the environment
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Investigate the target
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Submit the flag
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Linux-Buffer Overflow. Exploiting a gets() Vulnerability
Mission
A vulnerable SUID C binary with protections disabled is provided. Exploit its buffer overflow to redirect control flow into a hidden function.
Hints
Hint 1 Show
Analyze the binary with gdb to find the vulnerable function and buffer size
Hint 2 Show
Use objdump or nm to find the address of the win function
Hint 3 Show
Craft a payload that overwrites the return address after the correct padding length