CVE-2019-8992 in ActiveMatrix BPM
Summary
by MITRE
The administrative server component of TIBCO Software Inc.'s TIBCO ActiveMatrix BPM, TIBCO ActiveMatrix BPM Distribution for TIBCO Silver Fabric, TIBCO ActiveMatrix Policy Director, TIBCO ActiveMatrix Service Bus, TIBCO ActiveMatrix Service Grid, TIBCO ActiveMatrix Service Grid Distribution for TIBCO Silver Fabric, TIBCO Silver Fabric Enabler for ActiveMatrix BPM, and TIBCO Silver Fabric Enabler for ActiveMatrix Service Grid contains a vulnerability wherein a user without privileges to upload distributed application archives ("Upload DAA" permission) can theoretically upload arbitrary code, and in some circumstances then execute that code on ActiveMatrix Service Grid nodes. Affected releases are TIBCO Software Inc.'s TIBCO ActiveMatrix BPM: versions up to and including 4.2.0, TIBCO ActiveMatrix BPM Distribution for TIBCO Silver Fabric: versions up to and including 4.2.0, TIBCO ActiveMatrix Policy Director: versions up to and including 1.1.0, TIBCO ActiveMatrix Service Bus: versions up to and including 3.3.0, TIBCO ActiveMatrix Service Grid: versions up to and including 3.3.1, TIBCO ActiveMatrix Service Grid Distribution for TIBCO Silver Fabric: versions up to and including 3.3.0, TIBCO Silver Fabric Enabler for ActiveMatrix BPM: versions up to and including 1.4.1, and TIBCO Silver Fabric Enabler for ActiveMatrix Service Grid: versions up to and including 1.3.1.
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Analysis
by VulDB Data Team • 09/06/2023
The vulnerability identified as CVE-2019-8992 represents a critical authorization bypass flaw within TIBCO's enterprise integration platform components, specifically affecting the administrative server functionality across multiple TIBCO ActiveMatrix products. This weakness stems from insufficient access controls that allow unauthorized users to circumvent normal security restrictions governing the upload of distributed application archives. The flaw exists in the permission model implementation where users lacking explicit "Upload DAA" privileges can still execute code execution attacks through malicious archive uploads, fundamentally undermining the principle of least privilege that is essential for enterprise security architectures.
The technical implementation of this vulnerability involves a failure in the administrative server's validation mechanisms that should enforce strict permission checks before allowing file upload operations. When users attempt to upload application archives, the system should verify that the requesting user possesses the necessary authorization level to perform such operations. However, the flaw allows attackers to bypass these checks, enabling them to upload malicious code archives that can subsequently be executed on ActiveMatrix Service Grid nodes. This represents a classic case of insufficient authorization checks, which maps directly to CWE-285: Improper Authorization, and can be categorized under the ATT&CK technique T1078: Valid Accounts, as it exploits legitimate system access paths to achieve unauthorized code execution.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it creates a potential attack vector for full system compromise within enterprise environments. Attackers can leverage this weakness to deploy malicious payloads that may include backdoors, data exfiltration tools, or other malicious software designed to persist within the network. The affected products span across TIBCO's core integration platform components, making this vulnerability particularly dangerous as it affects multiple interconnected systems within the same enterprise deployment. The vulnerability's scope includes versions up to and including 4.2.0 for ActiveMatrix BPM and related products, indicating that organizations running these legacy versions face significant risk exposure.
Organizations should implement immediate mitigations including strict access control enforcement, network segmentation around administrative interfaces, and comprehensive monitoring of upload activities within the affected TIBCO components. The recommended approach involves applying the vendor-provided security patches and updates, while also implementing additional security controls such as network access controls that restrict administrative interface access to trusted networks only. Security teams should conduct thorough vulnerability assessments to identify any unauthorized access attempts and implement behavioral analytics to detect anomalous upload patterns that may indicate exploitation attempts. This vulnerability highlights the critical importance of proper access control implementation and demonstrates how seemingly minor authorization flaws can create significant security risks in enterprise integration platforms, aligning with ATT&CK's T1496: Resource Hijacking principle where attackers compromise systems to perform unauthorized operations.