Security Experts:

Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Vulnerabilities

DLL Hijacking Flaws Patched in Trend Micro Password Manager

Trend Micro recently patched a couple of DLL hijacking vulnerabilities in Password Manager that could allow malicious actors to escalate privileges, make their malware persistent, and to load and execute their payloads via a signed service.

Trend Micro recently patched a couple of DLL hijacking vulnerabilities in Password Manager that could allow malicious actors to escalate privileges, make their malware persistent, and to load and execute their payloads via a signed service.

A security bulletin published by Trend Micro this week informs customers that an update released for its Password Manager 5.0, including the standalone version and the one shipped as an optional component of Premium Security and Maximum Security, fixes two DLL hijacking vulnerabilities.

The flaws, tracked as CVE-2019-14684 and CVE-2019-14687, were reported by researchers at SafeBreach and Infiniti Team – VinCSS. The weaknesses are similar, but they target different DLLs.

SafeBreach published a blog post on Wednesday disclosing the technical details of the vulnerability found by its researchers.

According to SafeBreach, the Trend Micro Password Manager’s Central Console Service executes a signed process, PwmSvc.exe, with SYSTEM privileges. This service then loads the Trend Micro Whitelist Module library (tmwlutil.dll), which in turn attempts to load another DLL file, tmtap.dll.

The problem is that this DLL is not loaded safely from an absolute path and the application does not verify that the loaded DLL is signed.

An attacker or process that has administrative privileges on the targeted device can modify the system PATH variable to include a folder they have control over. They can then place a malicious DLL named tmtap.dll in that folder, and it will get executed with SYSTEM privileges whenever Password Manager is started.

An attacker can exploit the vulnerability to have their malicious payloads loaded and executed by a signed process, which can be used to bypass application whitelisting mechanisms. It can also be used as a persistence mechanism as the malicious DLL will get executed every time the service is restarted.

An attacker with privileges limited to accessing only certain files and data can exploit the vulnerability to elevate privileges to SYSTEM, giving them complete access to the device.

The flaw was reported to Trend Micro on July 23 and it was patched just one week later, despite the fact that it has only been assigned a “medium severity” rating.

Related: Dozen Flaws Found in Trend Micro Email Encryption Gateway

Related: Code Execution Flaws Found in Trend Micro Smart Protection Server

Related: Trend Micro Patches Flaws in ServerProtect for Linux

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Expert Insights

Related Content

Mobile & Wireless

Technical details published for an Arm Mali GPU flaw leading to arbitrary kernel code execution and root on Pixel 6.

Mobile & Wireless

Apple rolled out iOS 16.3 and macOS Ventura 13.2 to cover serious security vulnerabilities.

Cloud Security

VMware vRealize Log Insight vulnerability allows an unauthenticated attacker to take full control of a target system.

Mobile & Wireless

Apple’s iOS 12.5.7 update patches CVE-2022-42856, an actively exploited vulnerability, in old iPhones and iPads.

Vulnerabilities

Security researchers have observed an uptick in attacks targeting CVE-2021-35394, an RCE vulnerability in Realtek Jungle SDK.

Vulnerabilities

Google has awarded more than $25,000 to the researchers who reported the vulnerabilities patched with the release of the latest Chrome update.

Mobile & Wireless

Two vulnerabilities in Samsung’s Galaxy Store that could be exploited to install applications or execute JavaScript code by launching a web page.

Vulnerabilities

Several vulnerabilities have been patched in OpenText’s enterprise content management (ECM) product.