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"MSI Packages Symbolic Links Processing - Windows 10 Privilege Escalation"

Author

Exploit author

nu11secur1ty

Platform

Exploit platform

windows

Release date

Exploit published date

2020-02-17

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# Exploit Title:  MSI Packages Symbolic Links Processing - Windows 10 Privilege Escalation
# Author: nu11secur1ty
# Date: 2020-02-14
# Vendor: Microsoft
# Link: https://github.com/nu11secur1ty/Windows10Exploits/tree/master/Undefined/CVE-2020-0683/nu11secur1ty
# CVE: CVE-2020-0683


[+] Credits: Ventsislav Varbanovski (@ nu11secur1ty)
[+] Website: https://www.nu11secur1ty.com/
[+] Source:  readme from GitHUB
[+] twitter.com/nu11secur1ty


[Exploit Program]
Link:
https://github.com/nu11secur1ty/Windows10Exploits/tree/master/Undefined/CVE-2020-0683/nu11secur1ty


[Vendor]
Microsoft


[Vulnerability Type]
Windows Installer Elevation of Privilege Vulnerability

[CVE Reference]

An elevation of privilege vulnerability exists in the Windows Installer
when MSI packages process symbolic links. An attacker who successfully
exploited this vulnerability could bypass access restrictions to add or
remove files.

To exploit this vulnerability, an attacker would first have to log on to
the system. An attacker could then run a specially crafted application that
could exploit the vulnerability and add or remove files.

The security update addresses the vulnerability by modifying how to reparse
points are handled by the Windows Installer.


[Security Issue]
Elevation of Privilege from user to C:\Windows\administartion execution
files


[References]

# CVE-2020-0683
Original Poc sent to MSRC.
Assigned to CVE-2020-0683 - Windows Installer Elevation of Privilege
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-0683

Source code for Visual Studio C++ 2019

Inside "nu11secur1ty" you'll find the exploit (exe) to execute.

# Note:

This test is using `system.ini` in c:\Windows\system.ini
When you exploit this file you should replace with the original file
`system.ini` after this test, which you will find in CVE-2020-0683
directory :)

--------------------------------------------------------------------------

- - How to run the exploit

Go into "nu11secur1ty" directory and from a cmd console launch:

- for the test

MsiExploit.exe  c:\Windows\system.ini"

Be sure that both "MsiExploit.exe" and "foo.msi" reside in the same directory.

- Disclaimer:

 The entry creation date may reflect when the CVE ID was allocated or
reserved, and does not necessarily indicate when this vulnerability
was discovered, shared with the affected vendor, publicly disclosed,
or updated in CVE.


- @nu11secur1ty


[Network Access]
Local


[Disclosure Timeline]
02/11/2020

[Disclaimer]

 The entry creation date may reflect when the CVE ID was allocated or
reserved, and does not necessarily indicate when this vulnerability
was discovered, shared with the affected vendor, publicly disclosed,
or updated in CVE.


nu11secur1ty
--
Release DateTitleTypePlatformAuthor
2020-04-14"Oracle WebLogic Server 12.2.1.4.0 - Remote Code Execution"webappsjavanu11secur1ty
2020-02-17"MSI Packages Symbolic Links Processing - Windows 10 Privilege Escalation"localwindowsnu11secur1ty
import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/48079/?format=json')

For full documentation follow the link above

Cipherscan. A very simple way to find out which SSL ciphersuites are supported by a target.

Identify and fingerprint Web Application Firewall (WAF) products protecting a website.