39 lines
645 B
C
39 lines
645 B
C
// gcc -o ./pwn -fno-stack-protector -no-pie ./ez_overflow.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#define BUFSIZE 32
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#define FLAGSIZE 64
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void init() {
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setvbuf(stdin, 0LL, 2, 0LL);
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setvbuf(stdout, 0LL, 2, 0LL);
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setvbuf(stderr, 0LL, 2, 0LL);
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}
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void win() {
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char buf[FLAGSIZE];
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int fd = open("flag", O_RDONLY);
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read(fd, buf, sizeof(buf));
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puts(buf);
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close(fd);
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}
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void vuln(){
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char buf[BUFSIZE];
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gets(buf);
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}
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int main(int argc, char **argv){
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init();
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printf("How to jump to 0x%x\n", win);
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puts("Please enter your string: ");
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vuln();
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return 0;
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}
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