38 lines
688 B
C
38 lines
688 B
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 <unistd.h>
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#include <sys/types.h>
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#define BUFFSIZE 64
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#define FLAGSIZE 64
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void flag() {
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char buf[FLAGSIZE];
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FILE *f = fopen("flag.txt","r");
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if (f == NULL) {
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printf("%s %s", "Please create 'flag.txt' in this directory with your",
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"own debugging flag.\n");
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exit(0);
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}
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fgets(buf,FLAGSIZE,f);
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printf(buf);
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}
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void vuln(){
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char buf[BUFFSIZE];
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gets(buf);
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}
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int main(int argc, char **argv){
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setvbuf(stdout, NULL, _IONBF, 0);
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gid_t gid = getegid();
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setresgid(gid, gid, gid);
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puts("Welcome to 64-bit. Give me a string that gets you the flag: ");
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vuln();
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return 0;
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}
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