VMware Workspace ONE Access and Identity Manager Command Injection Vulnerability Advisory (CVE-2020-4006)

1. Vulnerability Overview & Root Cause

This vulnerability (CVE-2020-4006) is a critical command injection flaw residing in the administrative configurator interface of VMware Workspace ONE Access and Identity Manager. The root cause is the lack of proper input validation and sanitization of user-supplied parameters before passing them to system shell execution functions (CWE-78). Although exploitation requires prior authentication to the configuration port (typically TCP 8443), the vulnerability allows any authenticated administrative user to execute arbitrary commands directly on the underlying operating system.

2. Exploitation Mechanics & Attack Scenario

An attacker must first obtain administrative credentials to access the configurator interface on port 8443. Once authenticated, the attacker sends crafted HTTP requests containing shell metacharacters (such as ';', '&&', or '|') embedded within configuration parameters. Because the application fails to sanitize these inputs, the backend server executes the injected payload as part of its system operations. This allows the attacker to establish a reverse shell, download malicious payloads, or manipulate system files with the privileges of the web application process.

3. Infrastructure & Business Impact

As a vulnerability listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, CVE-2020-4006 has been actively exploited in the wild by sophisticated threat actors. Successful exploitation leads to complete compromise of the identity provider infrastructure. Attackers can leverage this foothold to compromise Active Directory credentials, forge Single Sign-On (SSO) tokens, and perform lateral movement across the entire corporate network, posing an existential threat to enterprise security.