CVE-2017-9453 in Server Automation
Summary
by MITRE • 09/05/2023
BMC Server Automation before 8.9.01 patch 1 allows Process Spawner command execution because of authentication bypass.
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Analysis
by VulDB Data Team • 10/01/2023
The vulnerability identified as CVE-2017-9453 affects BMC Server Automation versions prior to 8.9.01 patch 1, presenting a critical authentication bypass flaw that enables unauthorized command execution through the Process Spawner component. This issue stems from insufficient authentication mechanisms within the Process Spawner service, which is designed to execute automated processes and commands across managed systems. The vulnerability creates a pathway for malicious actors to circumvent the normal authentication procedures and directly invoke command execution capabilities without proper authorization.
The technical flaw manifests in the Process Spawner's handling of authentication tokens and session validation. When a user attempts to execute commands through the Process Spawner interface, the system should verify credentials and permissions before allowing execution. However, due to the authentication bypass vulnerability, the system fails to properly validate user credentials, allowing any authenticated user or even unauthenticated attackers to submit commands that are then executed with the privileges of the Process Spawner service. This represents a classic case of insufficient authorization checks that can be categorized under CWE-285, which addresses improper authorization within software systems. The vulnerability essentially creates a backdoor execution path that bypasses normal security controls, enabling arbitrary code execution in the context of the Process Spawner service.
The operational impact of this vulnerability is severe and multifaceted, particularly within enterprise environments where BMC Server Automation is used for system management and automation tasks. Attackers who exploit this vulnerability can execute arbitrary commands on target systems, potentially leading to complete system compromise, data exfiltration, or disruption of critical business operations. The Process Spawner component typically operates with elevated privileges to perform system administration tasks, making this vulnerability particularly dangerous as it allows attackers to execute commands with high-level system permissions. This vulnerability can be leveraged for lateral movement within networks, privilege escalation, and persistence establishment, aligning with techniques documented in the MITRE ATT&CK framework under T1059 for command and script execution and T1068 for local privilege escalation.
Organizations utilizing BMC Server Automation should immediately implement the vendor-provided patch 8.9.01 or equivalent security updates to remediate this vulnerability. The patch addresses the authentication bypass by strengthening session validation and ensuring proper credential verification before command execution is permitted. Network segmentation and access controls should be implemented to limit exposure of the Process Spawner service to only authorized personnel. Additionally, monitoring should be enhanced to detect suspicious command execution patterns and unauthorized access attempts. Security teams should conduct comprehensive vulnerability assessments to identify any potential exploitation attempts and ensure that all systems running BMC Server Automation are updated to secure versions. The vulnerability demonstrates the critical importance of proper authentication mechanisms in automated systems and highlights the risks associated with insufficient authorization controls in enterprise management platforms.