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Uplay - Local Privilege Escalation



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# Exploit Title: Uplay - Local Privilege Escalation
# Date: 2019-08-07
# Exploit Author: Kusol Watchara-Apanukorn, Pongtorn Angsuchotmetee, Manich Koomsusi
# Vendor Homepage: https://uplay.ubisoft.com/
# Version:
# Tested on: Windows 10 x64
# CVE : N/A

# Vulnerability Description: "C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher" has in secure permission 
# that allows all BUILTIN-USER has full permission. An attacker replace the 
# vulnerability execute file with malicious file.

   Proof of Concept

C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher>icacls "C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher"
C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher BUILTIN\Users:(F)
                                                     NT SERVICE\TrustedInstaller:(I)(F)
                                                     NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)
                                                     NT AUTHORITY\SYSTEM:(I)(F)
                                                     NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
                                                     CREATOR OWNER:(I)(OI)(CI)(IO)(F)
                                                     APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(RX)
                                                     APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(OI)(CI)(IO)(GR,GE)
                                                     APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(I)(RX)
                                                     APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(I)(OI)(CI)(IO)(GR,GE)

Vulnerability Disclosure Timeline:
07 Aug, 19 : Found Vulnerability
07 Aug, 19 : Vendor Notification
14 Aug, 19 : Vendor Response
18 Sep, 19 : Vendor Fixed
18 Sep, 19  : Vendor released new patched
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