CVE-2020-5422 in BOSH System Metrics Server
Summary
by MITRE • 10/04/2020
BOSH System Metrics Server releases prior to 0.1.0 exposed the UAA password as a flag to a process running on the BOSH director. It exposed the password to any user or process with access to the same VM (through ps or looking at process details).
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Analysis
by VulDB Data Team • 11/16/2020
The vulnerability identified as CVE-2020-5422 affects the BOSH System Metrics Server component, specifically versions prior to 0.1.0, presenting a critical security flaw in cloud infrastructure management systems. This issue stems from improper handling of authentication credentials within the BOSH director environment, where sensitive information is inadvertently exposed through process execution details. The BOSH System Metrics Server operates as a monitoring component within the BOSH ecosystem, which manages and deploys cloud applications across various infrastructure platforms. When this server component fails to properly secure authentication tokens, it creates a significant attack surface that compromises the overall security posture of the cloud deployment.
The technical flaw manifests when the UAA (User Account and Authentication) password is passed as a command-line argument to a process running on the BOSH director VM. This practice violates fundamental security principles by exposing sensitive credentials in plaintext within the process table accessible through standard system utilities like ps command. The vulnerability represents a classic case of credential exposure through process arguments, which maps to CWE-256 and CWE-798 within the Common Weakness Enumeration framework. Attackers with access to the same VM can easily retrieve these credentials by examining running processes, effectively bypassing traditional authentication mechanisms and gaining unauthorized access to the UAA service.
The operational impact of this vulnerability extends beyond simple credential theft, as it fundamentally undermines the trust model of the BOSH deployment architecture. Any user or process with access to the VM can extract the UAA password, potentially enabling lateral movement within the cloud environment and unauthorized access to other systems protected by the same authentication service. This exposure creates a persistent security risk that remains active until the vulnerable component is updated, as the password remains accessible through process inspection mechanisms. The vulnerability aligns with ATT&CK technique T1056.001 for credential access through process injection and T1552.001 for unsecured credentials, demonstrating how insecure configuration management can create widespread compromise opportunities.
Mitigation strategies for this vulnerability require immediate remediation through updating the BOSH System Metrics Server to version 0.1.0 or later, which properly handles authentication credentials without exposing them in process arguments. Organizations should implement process monitoring and credential scanning tools to detect such exposures in other components of their infrastructure. Additional security measures include configuring proper process isolation, implementing credential management systems that avoid command-line parameter passing for sensitive information, and establishing regular security audits of running processes. The fix typically involves modifying the component to read credentials from secure configuration files or environment variables rather than command-line arguments, aligning with security best practices outlined in NIST SP 800-53 and ISO 27001 standards for secure system design and implementation.