CVE-2019-19632 in Big Monitoring Fabric
Summary
by MITRE
An issue was discovered in Big Switch Big Monitoring Fabric 6.2 through 6.2.4, 6.3 through 6.3.9, 7.0 through 7.0.3, and 7.1 through 7.1.3; Big Cloud Fabric 4.5 through 4.5.5, 4.7 through 4.7.7, 5.0 through 5.0.1, and 5.1 through 5.1.4; and Multi-Cloud Director through 1.1.0. An unauthenticated attacker may inject stored arbitrary JavaScript (XSS), and execute it in the content of authenticated administrators.
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Analysis
by VulDB Data Team • 03/26/2024
This vulnerability represents a critical cross-site scripting flaw that affects multiple versions of Big Switch's network monitoring and management platforms. The issue stems from insufficient input validation and output encoding mechanisms within the web interface components of these network fabric solutions. Attackers can exploit this weakness by injecting malicious javascript code into application inputs that are subsequently stored and displayed to authenticated administrators without proper sanitization. The vulnerability exists across several major product lines including Big Monitoring Fabric, Big Cloud Fabric, and Multi-Cloud Director, indicating a widespread architectural flaw in the web application layer of these network management tools.
The technical exploitation of this vulnerability occurs through stored cross-site scripting techniques where malicious payloads are persisted in the application's database or configuration storage. When authenticated administrators access pages containing the malicious content, the injected javascript executes within their browser context with the privileges of their authenticated session. This creates a significant risk for network administrators who may inadvertently view compromised content in dashboard reports, configuration screens, or monitoring interfaces. The attack vector requires no authentication from the malicious actor initially, as they can inject the payload through various input points in the web application, making it particularly dangerous for environments where administrators frequently interact with potentially compromised data feeds or user inputs.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to escalate privileges, steal session cookies, perform unauthorized administrative actions, and potentially exfiltrate sensitive network configuration data. Network administrators who rely on these monitoring platforms for critical infrastructure oversight become potential victims of this attack, creating a direct threat to network security operations. The vulnerability's persistence through multiple product versions suggests that organizations using these platforms face ongoing risk regardless of patch status, as the underlying architectural flaw affects core web application components. This type of vulnerability directly violates security principle of least privilege and can undermine the integrity of network monitoring operations, as administrators may unknowingly execute malicious code while performing routine administrative tasks.
Organizations should implement immediate mitigations including web application firewall rules to filter suspicious javascript patterns, regular security scanning of web interfaces, and comprehensive input validation across all user-facing application components. Network segmentation and privilege separation can help limit the potential damage from successful exploitation, while regular security awareness training for administrators can help identify suspicious content. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a clear violation of ATT&CK technique T1059.007 for script execution through web interfaces. Regular patching and vulnerability management programs should prioritize this issue given its potential for privilege escalation and unauthorized access to critical network management functions. Organizations should also consider implementing additional monitoring for suspicious administrative activities that could indicate exploitation attempts.