CVE-2021-29243 in Manager
Summary
by MITRE • 11/08/2021
Cloudera Manager 5.x, 6.x, 7.1.x, 7.2.x, and 7.3.x allows XSS.
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Analysis
by VulDB Data Team • 11/11/2021
Cloudera Manager represents a critical enterprise-grade platform for managing and monitoring Hadoop clusters, serving as a central control point for distributed data processing environments. The vulnerability identified as CVE-2021-29243 affects multiple versions of this management software, specifically spanning 5.x, 6.x, 7.1.x, 7.2.x, and 7.3.x release lines. This cross-version impact indicates a persistent flaw in the platform's input validation and output encoding mechanisms that has remained unaddressed across several major releases. The vulnerability manifests as a cross-site scripting vulnerability that compromises the security integrity of the management interface, potentially allowing unauthorized actors to execute malicious scripts within the context of authenticated user sessions. The affected system operates within enterprise environments where Cloudera Manager serves as the primary administrative interface for critical data infrastructure, making this vulnerability particularly concerning for organizations managing sensitive data workloads.
The technical flaw underlying CVE-2021-29243 stems from insufficient sanitization of user-supplied input within the Cloudera Manager web interface. When users interact with the platform through web-based administrative functions, the system fails to properly encode or escape potentially malicious input before rendering it in web pages. This vulnerability typically occurs in areas where user-provided data is directly incorporated into HTML output without adequate security controls. The flaw can be exploited through various vectors including form fields, URL parameters, or API endpoints that accept user input for display purposes. According to CWE classification, this vulnerability maps to CWE-79 which specifically addresses Cross-Site Scripting flaws in web applications. The vulnerability's presence in multiple versions suggests that the underlying input validation logic has fundamental architectural weaknesses rather than being a simple isolated bug, indicating a systemic issue in how the platform handles user input across its various components.
The operational impact of this XSS vulnerability extends beyond simple script execution, potentially enabling attackers to perform session hijacking, steal sensitive administrative credentials, or manipulate the management interface to gain unauthorized access to cluster configurations. An attacker could leverage this vulnerability to inject malicious JavaScript that would execute in the context of other authenticated users' browsers, effectively allowing them to perform administrative actions on behalf of legitimate users. This threat model aligns with ATT&CK technique T1531 which focuses on modifying system binaries and configuration files, though in this case the attack vector targets the web interface rather than system files. The vulnerability's exploitation could lead to complete compromise of the Hadoop cluster management infrastructure, potentially allowing attackers to modify cluster settings, access sensitive data configurations, or even orchestrate attacks against the underlying data processing systems. Organizations relying on Cloudera Manager for enterprise data management face significant risk as the attacker could leverage this vulnerability to establish persistent access to their data infrastructure.
Mitigation strategies for CVE-2021-29243 require immediate attention from security teams responsible for enterprise data infrastructure. Organizations should prioritize applying the vendor-provided patches and updates that address the XSS vulnerability in their specific Cloudera Manager versions. The remediation process should include comprehensive testing of the patched environment to ensure that the XSS vulnerability has been properly resolved without introducing regressions in functionality. Network segmentation and access controls should be implemented to limit exposure of the Cloudera Manager interface to trusted administrative networks only, reducing the attack surface available to potential exploiters. Security monitoring should be enhanced to detect suspicious activities related to the management interface, including unusual login patterns or attempts to inject malicious content. Additionally, regular security assessments should be conducted to identify other potential vulnerabilities within the Hadoop ecosystem, as this XSS flaw demonstrates that the platform may contain other security weaknesses that require attention. The remediation efforts should also include user education programs to raise awareness about recognizing and reporting suspicious activities within the management interface, as social engineering attacks often complement technical exploits to achieve successful compromise of enterprise systems.