Two times sixteen
20 points Easy

Your task is simple - call the function print_flag. It is guarded by a couple of ifs - good luck in defeating them.

nc rivit.dev 10000

task.tar.gz
Flag
Binary · Rivit
74 solves
Rating 4.95
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Discussion

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fhyar

1 week ago

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error the binary file from the tar archive " ┌──(XD㉿linux)-[~/Desktop] └─$ ./task zsh: no such file or directory: ./task"

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kerszi

2 weeks ago

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wrong binary... only online works

ldd ./task linux-gate.so.1 (0xf7f84000) ./libc.so.6 => not found

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Bittz

1 year ago

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i cant get it please help.. @rivit

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Rivit

1 year ago

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you can ask for help on ctflearn discord :)

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Bittz

1 year ago

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Protected
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Bittz

1 year ago

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ASLR issue.. please help me..

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Orabidoo

1 year ago

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Is there anything wrong with executable from tar? I can't run it...

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Canlex

1 year ago

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dijidontknow

2 years ago

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Protected
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Rivit

2 years ago

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Make sure that rsp & 0xF == 0 when calling the print_flag function. If it is not, you need to pad your payload with ret instruction, see - https://www.ctfnote.com/pwn/linux-exploitation/rop/stack-alignment

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