CVE-2021-22037 : Vulnerability Insights and Analysis

A vulnerability has been identified in VMware InstallBuilder, affecting all versions prior to version 21.6.0. This vulnerability could allow an attacker to execute malicious commands by exploiting Path Interception through Search Order Hijacking.

Understanding CVE-2021-22037

This section will cover what CVE-2021-22037 is and its impact, along with technical details and mitigation strategies.

What is CVE-2021-22037?

CVE-2021-22037 is a security flaw in VMware InstallBuilder related to uncontrolled search path elements. The issue arises when manipulating the Windows registry, potentially enabling threat actors to plant malicious commands.

The Impact of CVE-2021-22037

The vulnerability in InstallBuilder could be exploited by attackers to carry out unauthorized actions using a hijacked reg.exe system command. This could lead to malicious code execution and compromise the security of Windows installers.

Technical Details of CVE-2021-22037

This section will delve into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

InstallBuilder utilizes the reg.exe system command without enforcing the full path, allowing a search in the system path until a binary is identified. This opens up the possibility for attackers to manipulate the search order and execute malicious commands.

Affected Systems and Versions

All versions of VMware InstallBuilder preceding version 21.6.0 are impacted by this vulnerability, specifically affecting Windows installers.

Exploitation Mechanism

By exploiting Path Interception through Search Order Hijacking, threat actors can plant a malicious reg.exe command to take precedence over the legitimate system command, leading to unauthorized command execution.

Mitigation and Prevention

To address CVE-2021-22037, immediate steps should be taken along with long-term security practices, including regular patching and updates.

Immediate Steps to Take

Users should update their VMware InstallBuilder to version 21.6.0 or newer to mitigate the vulnerability. It is also advised to monitor for any suspicious activities related to registry manipulations.

Long-Term Security Practices

Implementing strong access control policies, restricting command execution rights, and conducting regular security audits can help prevent similar exploitation attempts in the future.

Patching and Updates

Frequent software updates and security patches from VMware should be applied promptly to ensure systems are protected against known vulnerabilities.