CVE-2021-20722 : Vulnerability Insights and Analysis

A vulnerability in the installers of ScanSnap Manager and the Software Download Installer prior to specific versions could allow an attacker to execute arbitrary code and gain elevated privileges.

Understanding CVE-2021-20722

This CVE involves an untrusted search path vulnerability in the mentioned installers, enabling an attacker to exploit the privilege of the user running the installer.

What is CVE-2021-20722?

The vulnerability lies in the installers of ScanSnap Manager and the Software Download Installer before certain versions. It permits attackers to execute unauthorized code with the invoked user's privileges using a malicious DLL.

The Impact of CVE-2021-20722

The impact includes the risk of privilege escalation and arbitrary code execution by malicious actors exploiting the vulnerability in the installers.

Technical Details of CVE-2021-20722

The following details shed light on the technical aspects of CVE-2021-20722:

Vulnerability Description

The vulnerability lets threat actors execute arbitrary code with escalated privileges through a Trojan horse DLL in an undisclosed directory when the affected installers are initiated.

Affected Systems and Versions

The vulnerable systems include the installers of ScanSnap Manager and the Software Download Installer that are earlier than versions V7.0L20 and prior to WinSSInst2JP.exe and WinSSInst2iX1500JP.exe.

Exploitation Mechanism

Attackers can exploit this security flaw by planting a malicious DLL in an unspecified directory, leveraging it to execute unauthorized code with the user's privileges invoking the installer.

Mitigation and Prevention

To address CVE-2021-20722, consider the following mitigation strategies:

Immediate Steps to Take

Update to the latest versions of ScanSnap Manager and the Software Download Installer to eliminate the vulnerability.
Monitor for any signs of unauthorized access or system compromise.

Long-Term Security Practices

Regularly patch and update your software to stay protected against known vulnerabilities.
Implement robust security measures to enhance overall system security.

Patching and Updates

Stay informed about security bulletins and updates from FUJITSU LIMITED and PFU LIMITED to deploy patches promptly and secure your systems effectively.