CrossCTF_2017: Finals Defense

Category: Finals Points: 10 Description:

Time to practice for the finals! Patch the binary so that the flag can't be printed. Remember to test it locally first with the following command! while true;do nc -l -p 9001 -e ./one done; File here


An easy patching, just change the instructions at flag to leave & ret. Too bad they don't check the binary thoroughly. LOL.

Therefore, the flag is CrossCTF{P@TCHING_IZ_E@SY}.