CVE-2019-3754 in Unity Operating Environment
Summary
by MITRE
Dell EMC Unity Operating Environment versions prior to 5.0.0.0.5.116, Dell EMC UnityVSA versions prior to 5.0.0.0.5.116 and Dell EMC VNXe3200 versions prior to 3.1.10.9946299 contain a reflected cross-site scripting vulnerability on the cas/logout page. A remote unauthenticated attacker could potentially exploit this vulnerability by tricking a victim application user to supply malicious HTML or Java Script code to Unisphere, which is then reflected back to the victim and executed by the web browser.
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Analysis
by VulDB Data Team • 12/11/2023
This vulnerability exists in Dell EMC Unity Operating Environment, UnityVSA, and VNXe3200 systems where the cas/logout page fails to properly sanitize user input, creating a reflected cross-site scripting flaw that allows remote attackers to execute malicious code in the context of a victim user's browser session. The vulnerability specifically affects versions prior to 5.0.0.0.5.116 for Unity environments and 3.1.10.9946299 for VNXe3200 systems, representing a critical security gap in the web-based management interfaces. The flaw operates through the reflection of malicious input from the logout page, which serves as an attack vector for social engineering and phishing attempts. According to CWE-79, this represents a classic cross-site scripting vulnerability where untrusted data is directly included in web responses without proper sanitization or encoding. The vulnerability aligns with ATT&CK technique T1566.001 for phishing and T1059.007 for script injection, as it enables attackers to execute arbitrary JavaScript code within the victim's browser context.
The operational impact of this vulnerability is significant as it allows a remote unauthenticated attacker to potentially compromise user sessions and execute malicious code in the victim's browser. When a user is tricked into clicking a malicious link or visiting a compromised page, the attacker can inject JavaScript that executes in the context of the legitimate Unisphere web interface. This creates opportunities for session hijacking, credential theft, data exfiltration, and further exploitation within the network environment. The reflected nature of the vulnerability means that the malicious payload is immediately executed without requiring persistent storage on the target system, making it particularly dangerous for web-based management interfaces that users frequently access. The attack requires user interaction through social engineering techniques, but once executed, it can provide attackers with the same privileges as the victim user within the management interface.
Mitigation strategies for this vulnerability should include immediate patching of affected systems to versions 5.0.0.0.5.116 or later for Unity environments and 3.1.10.9946299 or later for VNXe3200 systems. Organizations should also implement network segmentation to limit access to management interfaces, enforce strict access controls, and deploy web application firewalls to monitor and filter malicious traffic. Additional protective measures include disabling unnecessary web services, implementing proper input validation and output encoding, and conducting regular security assessments of management interfaces. Security awareness training for administrators can help prevent successful social engineering attacks that exploit this vulnerability, while monitoring for suspicious user activities and anomalous access patterns can aid in early detection of exploitation attempts. Organizations should also consider implementing multi-factor authentication for management interface access and regularly review access logs for signs of unauthorized activity. The vulnerability demonstrates the importance of input validation in web applications and highlights the critical need for proper security testing of management interfaces that are accessible over networks.