CVE-2016-5062 in Aternity
Summary
by MITRE
The web server in Aternity 9 and earlier does not require authentication for getMBeansFromURL loading of Java MBeans, which allows remote attackers to execute arbitrary Java code by registering MBeans.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2016-5062 affects Aternity versions 9 and earlier, specifically targeting the web server component that handles Java MBeans loading through the getMBeansFromURL functionality. This represents a critical security flaw that fundamentally undermines the authentication mechanisms of the affected system. The vulnerability stems from the web server's failure to enforce proper authentication checks when processing requests for Java MBeans, creating an attack surface where unauthenticated remote adversaries can directly interact with the Java management infrastructure.
The technical flaw manifests in the improper handling of the getMBeansFromURL endpoint, which serves as an entry point for Java MBean registration and loading operations. When a remote attacker sends a specially crafted request to this endpoint, the system processes the request without validating the sender's credentials or authorization status. This authentication bypass allows attackers to register arbitrary Java MBeans within the target system, effectively granting them the ability to execute arbitrary Java code with the privileges of the web server process. The vulnerability is particularly dangerous because it leverages the legitimate Java management capabilities of the system to achieve unauthorized code execution, making detection more challenging.
The operational impact of this vulnerability is severe and multifaceted, potentially allowing attackers to gain complete control over the affected Aternity server. Remote code execution capabilities enable adversaries to install backdoors, exfiltrate sensitive data, modify system configurations, or use the compromised system as a pivot point for further attacks within the network. The vulnerability affects the integrity and confidentiality of the entire system, as attackers can manipulate the Java runtime environment and access any data that the web server process can reach. Additionally, the attack can be executed entirely remotely without requiring any local access or prior exploitation of other vulnerabilities, making it particularly attractive to threat actors.
This vulnerability maps to CWE-287, which addresses improper authentication issues in software systems, and aligns with several ATT&CK techniques including T1059 for command and script interpreter and T1078 for valid accounts. The attack chain typically begins with reconnaissance to identify the vulnerable Aternity installation, followed by exploitation of the authentication bypass to register malicious MBeans. The mitigation strategy should focus on implementing proper authentication controls for all management endpoints, including the getMBeansFromURL functionality. Organizations should upgrade to Aternity versions that address this vulnerability, implement network segmentation to limit access to management interfaces, and deploy monitoring solutions to detect unusual MBean registration patterns. Additionally, restricting network access to the web server through firewalls and implementing principle of least privilege for web server accounts can significantly reduce the attack surface and potential impact of this vulnerability.