0day.today - Biggest Exploit Database in the World.
- We use one main domain: http://0day.today
- Most of the materials is completely FREE
- If you want to purchase the exploit / get V.I.P. access or pay for any other service,
you need to buy or earn
GOLD
Administration of this site uses the official contacts. Beware of impostors!
We DO NOT use Telegram or any messengers / social networks!Please, beware of scammers!
- Read the [ agreement ]
- Read the [ Submit ] rules
- Visit the [ faq ] page
- [ Register ] profile
- Get [ GOLD ]
- If you want to [ sell ]
- If you want to [ buy ]
- If you lost [ Account ]
- Any questions [ admin@0day.today ]
- Authorisation page
- Registration page
- Restore account page
- FAQ page
- Contacts page
- Publishing rules
- Agreement page
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
Contact us
You can contact us by:
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
InstantHMI 6.1 - Privilege Escalation
[Title: InstantHMI - EoP: User to ADMIN
CWE Class: CWE-276: Incorrect Default Permissions
Date: 01/06/2016
Vendor: Software Horizons
Product: InstantHMI
Version: 6.1
Download link: http://www.instanthmi.com/ihmisoftware.htm
Tested on: Windows 7 x86, fully patched
Release mode: no bugbounty program, public release
Installer Name: IHMI61-PCInstall-Unicode.exe
MD5: ee3ca3181c51387d89de19e89aea0b31
SHA1: c3f1929093a3bc28f4f8fdd9cb38b1455d7f0d6f
- 1. Introduction: -
During a standard installation (default option) the installer
automatically creates a folder named "IHMI-6" in the root drive.
No other location can be specified during standard installation.
As this folder receives default permissions AUTHENTICATED USERS
are given the WRITE permission.
Because of this they can replace binaries or plant malicious
DLLs to obtain elevated, administrative level, privileges.
- 2. Technical Details/PoC: -
A. Obtain and execute the installer.
B. Observe there is no prompt for the installation location.
C. Review permissions under the Explorer Security tab or run icacls.exe
Example:
IHMI-6 BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(OI)(CI)(RX)
NT AUTHORITY\Authenticated Users:(I)(M)
NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)
Successfully processed 1 files; Failed processing 0 files
D. Change the main executable: InstantHMI.exe with a malicious copy.
E. Once executed by an administrator our code will run
under administrator level privileges.
- 3. Mitigation: -
A. Install under "c:\program files" or "C:\Program Files (x86)"
B. set appropriate permissions on the application folder.
- 4. Author: -
sh4d0wman
# 0day.today [2024-12-24] #