CVE-2017-7667 in NiFi
Summary
by MITRE
Apache NiFi before 0.7.4 and 1.x before 1.3.0 need to establish the response header telling browsers to only allow framing with the same origin.
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Analysis
by VulDB Data Team • 10/16/2019
Apache NiFi versions prior to 0.7.4 and 1.x versions before 1.3.0 contain a critical security vulnerability related to improper implementation of the X-Frame-Options header. This vulnerability exposes applications to clickjacking attacks where malicious actors can embed the NiFi interface within iframe elements on compromised websites, enabling them to deceive users into performing unintended actions. The flaw stems from the absence of proper frame-ancestry controls that should prevent the application from being embedded in external domains. Without the X-Frame-Options header set to SAMEORIGIN or DENY, attackers can craft malicious web pages that load NiFi interfaces within hidden iframes, potentially capturing user credentials or executing unauthorized operations through overlay techniques. This vulnerability directly maps to CWE-1021, which specifically addresses Improper Restriction of Rendered UI Layers or Frames. The impact extends beyond simple information disclosure as it enables full privilege escalation through session hijacking and unauthorized administrative actions. The operational consequences are severe since NiFi typically handles sensitive data flows and process automation, making it an attractive target for attackers seeking to compromise enterprise data pipelines. Organizations using affected versions face significant risk of unauthorized access to their data processing workflows and potential lateral movement within their network infrastructure. The vulnerability aligns with ATT&CK technique T1551.003, which covers credentials in files, as compromised NiFi interfaces could provide attackers with access to authentication tokens and administrative capabilities. The fix requires implementing the X-Frame-Options header with appropriate values to restrict framing to the same origin, which is a standard security practice for web applications. This remediation addresses the core issue by ensuring that browsers enforce proper frame restrictions, preventing malicious embedding of the NiFi interface. The vulnerability demonstrates the critical importance of proper web application security headers and the potential for seemingly minor configuration gaps to create significant security risks in enterprise-grade data processing platforms.
The absence of proper X-Frame-Options implementation in these NiFi versions creates a fundamental security gap that violates industry best practices for web application security. This vulnerability represents a classic case of insufficient input validation and output encoding where the application fails to properly control how its content can be embedded within other web pages. The flaw affects not only the user interface but also the underlying security model of the application, as it allows for potential bypass of authentication mechanisms through frame manipulation techniques. Security researchers have noted that this vulnerability is particularly dangerous because NiFi is often deployed in environments where it handles sensitive operational data and process automation tasks. The vulnerability creates an attack surface that can be exploited by adversaries with minimal technical expertise, as it relies on standard web browser behaviors rather than complex exploitation techniques. Organizations should immediately implement patch management procedures to upgrade to versions 0.7.4 or 1.3.0 and above, which properly enforce the X-Frame-Options header. The remediation process should include thorough testing of the updated configuration to ensure that legitimate use cases such as embedding within trusted internal applications continue to function properly while preventing malicious embedding. Additionally, security teams should review their existing monitoring and detection capabilities to identify any potential exploitation attempts that may have occurred prior to patching. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security configurations and the necessity of comprehensive security testing across all application components. This issue highlights the need for robust security controls in data processing platforms that handle sensitive enterprise information and demonstrates how simple header configurations can have significant security implications.