![]() ![]() Trend Micro Password Manager is a software that can be installed together with Trend Micro Maximum Security.ĭuring an analysis of the operations performed during the start-up of the operating system, it was possible to detect that the Trend Micro Password Manager Central Control Service, through its main process PwmSvc.exe, is responsible for creating a new process called certutil.exe, which aims to manipulate Firefox browser certificates. To do this, the attacker just inserts a malicious DLL with the same name as the one requested, in a previous directory in the search order. The fact is that if the loading of a DLL is implemented insecurely, an attacker can take advantage of the search order to perform an attack known as Hijacking DLL. (Image credit: Trend Micro) (opens in new tab) 6 Trend Micro Antivirus. Microsoft’s documentation, Load Library Safely, can be found for more details on the topic. There are no parental controls, the password manager holds only 15 entries and. However, there are several ways to change the search order of a DLL. The directories that appear listed in the PATH environment variable. The directory from which the application was loaded Ħ. This search order is performed in the following directories, consecutively:ġ. If the absolute file path is not provided, Windows will by default use the natural resource of the DLL search order find the unloaded module. The import of a DLL can be performed through the functions LoadLibrary() and LoadLibraryEx(). ![]() However, they usually inherit the permissions of the process that imported them. In the following text, we will briefly present some basic concepts on the subject, as well as the demonstration of this vulnerability in Trend Micro Password Manager DLL (Dynamic Link Library)Īccording to Microsoft’s documentation, a Dynamic Link Library is a binary module that has a set of functions and data that can be used by other binary modules - that is, a set of functions and data that can be used by another DLL or an executable.Ī feature of DLL functions is that they do not inherit the permissions set in the Access Control List (ACL) of the uploaded files when they are imported. It enables a privilege escalation that grants NT AUTHORITY_SYSTEM (user who has full local privilege) to whomever exploits it through a Hijacking DLL. Tempest’s Consulting Team, has detected a vulnerability in Trend Micro Password Manager. ![]()
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