Message-ID: <CAFD2FDO-uS5YPmAUV+bZjBcNPwnKHefm1QNQuZiH1-GJYHddvw@mail.gmail.com>
Date: Thu, 16 Jan 2020 22:23:22 -0500
From: hyp3rlinx <apparitionsec@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] CVE-2019-19697 / Trend Micro Security 2019 (Consumer) /
 Security Bypass Protected Service Tampering

[+] Credits: John Page (aka hyp3rlinx)
[+] Website: hyp3rlinx.altervista.org
[+] Source:
http://hyp3rlinx.altervista.org/advisories/TREND-MICRO-SECURITY-CONSUMER-SECURITY-BYPASS-PROTECTED-SERVICE-TAMPERING.txt
[+] ISR: ApparitionSec


[Vendor]
www.trendmicro.com


[Product]
Trend Micro Security 2019 (Consumer) Multiple Products


Trend Micro Security provides comprehensive protection for your devices.
This includes protection against ransomware, viruses, malware, spyware, and
identity theft.


[Vulnerability Type]
Security Bypass Protected Service Tampering


[CVE Reference]
CVE-2019-19697


[Security Issue]
Trend Micro Maximum Security is vulnerable to arbitrary code execution as
it allows for creation of registry key to target a process running as
SYSTEM.
This can allow a malware to gain elevated privileges to take over and
shutdown services that require SYSTEM privileges like Trend Micros "Asmp"
service "coreServiceShell.exe" which does not allow Administrators to
tamper with them.

This could allow an attacker or malware to gain elevated privileges and
tamper with protected services by disabling or otherwise preventing them to
start.
Note administrator privileges are required to exploit this vulnerability.


[CVSS 3.0 Scores: 3.9]


[Affected versions]
Platform Microsoft Windows
Premium Security 2019 (v15)
Maximum Security 2019 (v15)
Internet Security 2019 (v15)
Antivirus + Security 2019 (v15)


[References]
https://esupport.trendmicro.com/en-us/home/pages/technical-support/1124090.aspx


[Exploit/POC]
1) Create a entry for the following registry key targeting "PtWatchdog.exe"
and set the debugger string value to an arbitrary executable to gain SYSTEM
privs.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File
Execution Options\PtWatchdog.exe

2) Create a string named "debugger" under the reg key and give it the value
of the executable you wish to run as SYSTEM.

3) Restart the machine or wait until service is restart then you get SYSTEM
and can now disable Trend Micro endpoint security coreServiceShell.exe
service


[Network Access]
Local


[Severity]
Low


[Disclosure Timeline]
Vendor Notification: October 8, 2019
Vendor confirms issue: October 28, 2019
Vendor release date: January 14, 2020
January 16, 2020 : Public Disclosure


[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the
information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author
prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).

hyp3rlinx

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