CVE-2020-28369 : Exploit Details and Defense Strategies

This CVE record pertains to a vulnerability in BeyondTrust Privilege Management for Windows that allows the loading of Cryptbase.dll from a user-writable location, potentially leading to security issues.

Understanding CVE-2020-28369

This section provides insights into the nature and impact of CVE-2020-28369.

What is CVE-2020-28369?

CVE-2020-28369 involves a security flaw in BeyondTrust Privilege Management for Windows, specifically version 5.7, where a SYSTEM installation triggers the loading of Cryptbase.dll from the user-writable directory %WINDIR%\Temp.

The Impact of CVE-2020-28369

The vulnerability could be exploited by attackers to load malicious Cryptbase.dll files, potentially leading to unauthorized access, data breaches, and system compromise.

Technical Details of CVE-2020-28369

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw allows a SYSTEM installation to load Cryptbase.dll from a user-writable location, which can be abused by threat actors.

Affected Systems and Versions

Vendor: BeyondTrust
Product: Privilege Management for Windows
Versions: Up to and including 5.7

Exploitation Mechanism

Attackers can place a malicious Cryptbase.dll in %WINDIR%\Temp, leveraging the SYSTEM installation to load the compromised DLL.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2020-28369.

Immediate Steps to Take

Monitor %WINDIR%\Temp for unauthorized Cryptbase.dll files.
Implement file integrity monitoring to detect changes in critical system directories.
Consider restricting write access to %WINDIR%\Temp.

Long-Term Security Practices

Regularly update BeyondTrust Privilege Management for Windows to the latest version.
Conduct security training to educate users on identifying and reporting suspicious activities.

Patching and Updates

Ensure timely installation of security patches and updates provided by BeyondTrust to address CVE-2020-28369.