security-cw/vuln.c

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2020-11-25 15:16:52 +00:00
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
int copyData(char *string)
{
char buf[32];
strcpy(buf, string);
return (0);
}
int main(int argc, char *argv[])
{
char buffer[700];
FILE *file;
if (argc !=2)
{
printf("[*] invalid arguments!\n [*] > %s file_name\n",argv[0]);
exit(0);
}
printf("opening file\n");
file = fopen(argv[1],"rb");
if (!file)
{
//printf("file not opened %s", strerror(errno));
fprintf(stderr,"file not opened %s", strerror(errno));
//printf("error");
return (0);
}
printf("file opened\n");
fread(buffer, 699,1,file);
fclose(file);
copyData(buffer);
return (0);
}