CVE-2020-9290 : What You Need to Know
Learn about CVE-2020-9290 affecting FortiClient for Windows. Discover how local attackers can execute arbitrary code via malicious DLL files. Find mitigation steps and preventive measures.
FortiClient for Windows online installer 6.2.3 and below is affected by an Unsafe Search Path vulnerability that may allow local attackers to execute arbitrary code on the system.
Understanding CVE-2020-9290
What is CVE-2020-9290?
An Unsafe Search Path vulnerability in FortiClient for Windows online installer 6.2.3 and below enables local attackers to execute arbitrary code by uploading malicious Filter Library DLL files in a specific directory.
The Impact of CVE-2020-9290
This vulnerability could lead to unauthorized code execution by attackers with control over the installation directory, potentially compromising the system's security.
Technical Details of CVE-2020-9290
Vulnerability Description
The vulnerability in FortiClient for Windows online installer 6.2.3 and below allows local attackers to execute arbitrary code by manipulating the directory where specific installer files reside.
Affected Systems and Versions
- Product: Fortinet FortiClient for Windows
- Versions Affected: 6.2.3 and below
Exploitation Mechanism
Attackers with control over the directory containing FortiClientOnlineInstaller.exe and FortiClientVPNOnlineInstaller.exe can upload malicious Filter Library DLL files to execute arbitrary code.
Mitigation and Prevention
Immediate Steps to Take
- Update FortiClient to a patched version that addresses the vulnerability.
- Restrict access to the installation directory to prevent unauthorized file uploads.
Long-Term Security Practices
- Regularly monitor and audit file directories for unauthorized changes.
- Implement file integrity checks to detect tampering with critical files.
Patching and Updates
Ensure timely installation of security patches and updates provided by Fortinet to mitigate the CVE-2020-9290 vulnerability.