42 lines
952 B
C
42 lines
952 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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// --------------------------------------------------- SETUP
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void ignore_me_init_buffering() {
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setvbuf(stdin, NULL, _IONBF, 0);
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setvbuf(stdout, NULL, _IONBF, 0);
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setvbuf(stderr, NULL, _IONBF, 0);
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}
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// --------------------------------------------------- VULNERABLE FUNCTION
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int bug = 0;
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void vuln() {
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char name[1024];
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printf("What is your name?\n");
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int number_read = read(STDIN_FILENO, name, sizeof(name) - 1);
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name[number_read - 1] = 0;
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printf("Thank you ");
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printf(name);
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printf("!\n");
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if (bug) {
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printf("Oh, you got here somehow, you must have triggered a bug.. Here is "
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"the flag: ");
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system("cat /flag");
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exit(0);
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}
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printf("But our flag is in another branch!\n");
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}
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// --------------------------------------------------- MAIN
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int main(int argc, char **argv) {
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(void)argc;
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(void)argv;
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ignore_me_init_buffering();
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vuln();
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}
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