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System Hacking/Dreamhack

 (2)
[Dreamachk] mmapped write up 포너블 level1 정복 두 번째 문제 #include #include #include #include #include #define FLAG_SIZE 0x45 void initialize() { setvbuf(stdin, NULL, _IONBF, 0); setvbuf(stdout, NULL, _IONBF, 0); } int main(int argc, char *argv[]) { int len; char * fake_flag_addr; char buf[0x20]; int fd; char * real_flag_addr; initialize(); fd = open("./flag", O_RDONLY); len = FLAG_SIZE; fake_flag_addr = "DH{**********************..
[Dreamhack] Cherry write up 오랜만에 포너블 워게임 #include #include #include #include #include #include void alarm_handler() { puts("TIME OUT"); exit(-1); } void initialize() { setvbuf(stdin, NULL, _IONBF, 0); setvbuf(stdout, NULL, _IONBF, 0); signal(SIGALRM, alarm_handler); alarm(30); } void flag() { char *cmd = "/bin/sh"; char *args[] = {cmd, NULL}; execve(cmd, args, NULL); } int main(int argc, char *argv[]) { int stdin_fd = 0; i..

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