CVE-2021-23274 in API Exchange Gateway
Summary
by MITRE • 03/24/2021
The Config UI component of TIBCO Software Inc.'s TIBCO API Exchange Gateway and TIBCO API Exchange Gateway Distribution for TIBCO Silver Fabric contains a vulnerability that theoretically allows an unauthenticated attacker with network access to execute a clickjacking attack on the affected system. A successful attack using this vulnerability does not require human interaction from a person other than the attacker. Affected releases are TIBCO Software Inc.'s TIBCO API Exchange Gateway: versions 2.3.3 and below and TIBCO API Exchange Gateway Distribution for TIBCO Silver Fabric: versions 2.3.3 and below.
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Analysis
by VulDB Data Team • 04/04/2021
The vulnerability identified as CVE-2021-23274 resides within the Config UI component of TIBCO Software Inc.'s API Exchange Gateway products, representing a critical clickjacking flaw that undermines the security posture of these enterprise API management solutions. This vulnerability affects both the standalone TIBCO API Exchange Gateway and its distribution for TIBCO Silver Fabric, with all versions up to and including 2.3.3 being susceptible to exploitation. The flaw manifests in the web interface component that administrators use to configure and manage the API gateway functionality, creating a potential attack vector that could compromise the integrity of the entire API management infrastructure.
The technical nature of this vulnerability stems from insufficient protection mechanisms within the Config UI that fail to properly implement anti-clickjacking measures such as X-Frame-Options headers or Content Security Policy directives. This absence allows an attacker to embed the vulnerable configuration interface within a malicious iframe, effectively creating a deceptive user experience where legitimate administrative functions can be executed without the user's knowledge or consent. The vulnerability is particularly dangerous because it operates without requiring any human interaction beyond the initial network access, making it an automated attack vector that can be exploited at scale. The flaw essentially permits attackers to trick users into performing unintended actions within the context of the vulnerable application, potentially leading to unauthorized configuration changes or privilege escalation.
From an operational impact perspective, this vulnerability represents a significant risk to organizations relying on TIBCO API Exchange Gateway for their API management needs. The successful exploitation of this clickjacking vulnerability could enable attackers to modify API gateway configurations, potentially redirecting traffic, disabling security controls, or creating backdoor access points within the organization's API ecosystem. Given that these systems typically serve as critical infrastructure components for API traffic management and security enforcement, such an attack could compromise the entire API ecosystem, affecting multiple downstream services and potentially exposing sensitive data flows. The vulnerability's impact extends beyond simple configuration changes, as it could facilitate more sophisticated attacks including data exfiltration or service disruption.
Organizations affected by this vulnerability should prioritize immediate remediation through the application of available patches from TIBCO Software Inc. The mitigation strategy should include not only the software updates but also a comprehensive review of existing security controls and monitoring procedures to detect potential exploitation attempts. Security teams should implement additional network-level protections such as web application firewalls with clickjacking detection capabilities and ensure that all administrative interfaces are properly secured with appropriate HTTP headers and CSP policies. The vulnerability aligns with CWE-1021, which specifically addresses insufficient protection against clickjacking attacks, and represents a direct violation of the principle of least privilege as outlined in the ATT&CK framework under the T1071.004 technique for Application Layer Protocol. Organizations should also consider implementing network segmentation and access controls to limit exposure of administrative interfaces to trusted networks only, while maintaining detailed audit logs of all configuration changes to detect unauthorized modifications that may result from such attacks.