CVE-2019-17331 in EBX
Summary
by MITRE
The Data Exchange Web Interface component of TIBCO Software Inc.'s TIBCO EBX Add-ons contains a vulnerability that theoretically allows authenticated users to perform stored cross-site scripting (XSS) attacks. Affected releases are TIBCO Software Inc.'s TIBCO EBX Add-ons: versions up to and including 3.20.13, version 4.1.0.
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Analysis
by VulDB Data Team • 02/13/2024
The vulnerability identified as CVE-2019-17331 resides within the Data Exchange Web Interface component of TIBCO Software Inc.'s TIBCO EBX Add-ons suite, representing a critical security flaw that undermines the integrity of web-based data exchange operations. This vulnerability specifically affects authenticated users who possess legitimate access credentials to the system, creating a scenario where authorized personnel could become vectors for malicious cross-site scripting attacks. The flaw exists in the web interface's handling of user input and output rendering processes, where insufficient validation and sanitization mechanisms fail to properly escape or encode data before presentation to other users. The affected versions encompass TIBCO EBX Add-ons releases up to and including 3.20.13, as well as the specific version 4.1.0, indicating that this vulnerability has persisted across multiple release cycles and demonstrates a fundamental weakness in the application's security architecture.
The technical implementation of this stored XSS vulnerability occurs when authenticated users submit malicious payloads through the Data Exchange Web Interface, which are then stored within the application's database or memory structures. These payloads remain dormant until they are subsequently rendered to other users who access the affected web interface, thereby executing the malicious script code within their browser contexts. The vulnerability stems from inadequate input validation and output encoding practices that fail to properly sanitize user-supplied data before it is processed and displayed. This flaw allows attackers to inject malicious JavaScript code that can execute in the context of other users' browsers, potentially enabling session hijacking, credential theft, or the execution of unauthorized actions on behalf of legitimate users. The stored nature of this vulnerability means that the malicious payloads persist in the system and can affect multiple users over time, unlike reflected XSS attacks that require specific user interaction with malicious links or emails.
The operational impact of CVE-2019-17331 extends beyond simple data integrity concerns, as it fundamentally compromises the security model of the TIBCO EBX Add-ons environment. An attacker who successfully exploits this vulnerability could potentially access sensitive business data, manipulate user sessions, or escalate privileges within the application. The authenticated nature of the attack means that the threat actor must already have legitimate access credentials, but this access provides sufficient privileges to carry out malicious activities that would otherwise be restricted. This vulnerability directly violates the principle of least privilege and can lead to unauthorized data access, modification, or deletion within the enterprise business exchange framework. The potential for session hijacking represents a particularly severe consequence, as it could allow attackers to impersonate legitimate users and perform actions with their permissions and access rights. From an industry perspective, this vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and it maps to ATT&CK technique T1059.007 for script-based execution, highlighting the persistent threat this flaw poses to enterprise security postures.
Organizations utilizing affected TIBCO EBX Add-ons versions should prioritize immediate remediation through official patches provided by TIBCO Software Inc. The implementation of robust input validation and output encoding mechanisms represents the primary defense against similar vulnerabilities in the future. Security teams should conduct comprehensive vulnerability assessments to identify any potential exploitation attempts that may have occurred prior to patch deployment, while also implementing network monitoring to detect anomalous behavior patterns associated with XSS attack vectors. Additional mitigations include implementing content security policies, disabling unnecessary user input capabilities where possible, and establishing regular security audits of web application components. The vulnerability underscores the importance of maintaining up-to-date software versions and demonstrates how even authenticated access paths can become attack vectors when proper security controls are absent. Organizations should also consider implementing web application firewalls and intrusion detection systems specifically configured to detect and prevent XSS attack patterns, while ensuring that security awareness training includes recognition of potential XSS threats within business applications.