CVE-2016-9885 in GemFire for PCF
Summary
by MITRE
An issue was discovered in Pivotal GemFire for PCF 1.6.x versions prior to 1.6.5 and 1.7.x versions prior to 1.7.1. The gfsh (Geode Shell) endpoint, used by operators and application developers to connect to their cluster, is unauthenticated and publicly accessible. Because HTTPS communications are terminated at the gorouter, communications from the gorouter to GemFire clusters are unencrypted. An attacker could run any command available on gfsh and could cause denial of service, lost confidentiality of data, escalate privileges, or eavesdrop on other communications between the gorouter and the cluster.
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Analysis
by VulDB Data Team • 04/20/2025
The vulnerability identified as CVE-2016-9885 represents a critical authentication flaw in Pivotal GemFire for PCF versions 1.6.x before 1.6.5 and 1.7.x before 1.7.1. This issue affects the gfsh (Geode Shell) endpoint which serves as the primary administrative interface for cluster management and application development activities. The flaw stems from the absence of authentication mechanisms on what should be a protected administrative interface, making it accessible to any external entity with network connectivity to the cluster. This unauthenticated access creates a fundamental security breach that undermines the integrity and confidentiality of the entire GemFire deployment.
The technical implementation of this vulnerability involves the gfsh endpoint being publicly exposed without proper authentication controls, while the system architecture relies on HTTPS termination occurring at the gorouter level. This architectural choice creates a significant gap in the security model since communications between the gorouter and the GemFire clusters are transmitted in plaintext, lacking encryption protection. The unencrypted communication channel between these components creates multiple attack vectors that can be exploited by malicious actors positioned within the network or those who can intercept traffic. The vulnerability directly maps to CWE-312 (Sensitive Data Exposure) and CWE-287 (Improper Authentication) while also aligning with ATT&CK technique T1078 (Valid Accounts) and T1566 (Phishing) as attackers could leverage this access for privilege escalation and data exfiltration.
The operational impact of this vulnerability extends far beyond simple unauthorized access, creating substantial risk for organizations deploying GemFire in production environments. Attackers exploiting this vulnerability can execute any command available through the gfsh interface, potentially leading to complete system compromise. The ability to run arbitrary commands enables attackers to cause denial of service conditions that can disrupt business operations, access and modify sensitive data, escalate privileges to gain elevated system access, or perform eavesdropping on communications between the gorouter and cluster components. This vulnerability essentially provides attackers with a backdoor administrative interface that bypasses all normal security controls and access restrictions, creating a pathway for comprehensive system exploitation.
Organizations affected by this vulnerability should implement immediate mitigations including updating to the patched versions 1.6.5 and 1.7.1, which address the authentication issues and provide proper access controls for the gfsh endpoint. Network segmentation and firewall rules should be implemented to restrict access to the gfsh endpoint to only authorized administrative networks and IP addresses. Additionally, organizations should consider implementing encryption for communications between the gorouter and GemFire clusters to address the plaintext transmission issue. The remediation process should also include comprehensive audit of existing access controls, implementation of proper monitoring for unauthorized gfsh access attempts, and regular security assessments to ensure that similar vulnerabilities are not present in other components of the GemFire deployment. These measures align with security frameworks such as NIST SP 800-53 and ISO 27001 requirements for access control and data protection.