CVE-2024-28211 in nGrinder
Summary
by MITRE • 03/07/2024
nGrinder before 3.5.9 allows connection to malicious JMX/RMI server by default, which could be the cause of executing arbitrary code via RMI registry by remote attacker.
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Analysis
by VulDB Data Team • 08/06/2024
The vulnerability identified as CVE-2024-28211 affects nGrinder versions prior to 3.5.9 and represents a critical security flaw in the distributed load testing platform's default configuration. This issue stems from the application's insecure default settings that permit connections to potentially malicious JMX/RMI servers without proper authentication or authorization mechanisms. The vulnerability exists within the platform's remote monitoring and management capabilities, which are essential for distributed testing operations but become dangerous when improperly configured.
The technical flaw manifests in the default behavior of nGrinder's JMX/RMI connectivity implementation where the system does not enforce strict validation of remote server certificates or authenticate incoming connections. This misconfiguration creates an attack surface where remote adversaries can establish connections to malicious JMX/RMI servers that are designed to execute arbitrary code on the target system. The vulnerability is classified as a weakness in the system's trust model and authentication mechanisms, aligning with CWE-284 which addresses improper access control and CWE-310 which covers cryptographic issues in authentication.
From an operational perspective, this vulnerability poses significant risks to organizations using nGrinder for performance testing and load simulation. Attackers can exploit this flaw to gain unauthorized code execution capabilities on systems running vulnerable nGrinder versions, potentially leading to full system compromise. The attack vector is particularly concerning because it operates through default configurations that administrators might not immediately recognize as problematic. This type of vulnerability enables attackers to perform lateral movement within networks and establish persistent access points, which aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1059.001 for command and scripting interpreter.
The impact extends beyond immediate code execution capabilities as it can facilitate more sophisticated attack chains including privilege escalation, data exfiltration, and system reconnaissance. Organizations using nGrinder for testing environments that connect to production systems face particularly high risk since the vulnerability can be leveraged to compromise critical infrastructure. The default nature of this vulnerability means that many installations may remain unpatched for extended periods, creating prolonged exposure windows for attackers. Security professionals should consider implementing network segmentation and monitoring for unusual JMX/RMI traffic patterns as additional defensive measures while awaiting official patches.
Mitigation strategies should focus on immediate patching to nGrinder 3.5.9 or later versions which contain the necessary security fixes. Organizations should also implement strict firewall rules to restrict access to JMX/RMI ports, enforce certificate validation for all remote connections, and conduct thorough security assessments of existing nGrinder installations. The vulnerability demonstrates the critical importance of secure default configurations and proper authentication mechanisms in distributed systems, particularly those used for performance testing where elevated privileges are often required for system operations. Network administrators should also consider implementing intrusion detection systems to monitor for suspicious RMI registry connections and establish incident response procedures for potential exploitation attempts.