CVE-2016-8220 in GemFire for PCF
Summary
by MITRE
Pivotal Gemfire for PCF, versions 1.6.x prior to 1.6.5.0 and 1.7.x prior to 1.7.1.0, contain an information disclosure vulnerability. The application inadvertently exposed WAN replication credentials at a public route.
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Analysis
by VulDB Data Team • 01/27/2020
The vulnerability identified as CVE-2016-8220 affects Pivotal Gemfire for PCF versions 1.6.x before 1.6.5.0 and 1.7.x before 1.7.1.0, representing a critical information disclosure weakness that compromises the security posture of distributed caching systems. This vulnerability stems from improper handling of WAN replication credentials within the application's routing mechanisms, creating an unintended exposure of sensitive authentication materials to unauthorized parties. The flaw specifically manifests when WAN replication configurations are accessed through public routes, where credentials are inadvertently transmitted or stored in accessible locations without adequate protection measures.
The technical implementation of this vulnerability involves the application's failure to properly secure authentication tokens and credential information during WAN replication operations. When Gemfire instances communicate across different data centers or networks, the system typically requires authentication credentials to establish secure connections. However, the vulnerability allows these credentials to be exposed through public-facing endpoints, enabling attackers to intercept and access replication authentication materials. This represents a direct violation of the principle of least privilege and demonstrates inadequate input validation and output encoding practices within the application's network communication layers.
From an operational impact perspective, this vulnerability creates significant risk for organizations utilizing Pivotal Gemfire for PCF in production environments. The exposure of WAN replication credentials enables potential attackers to gain unauthorized access to distributed data replication processes, potentially leading to data compromise, unauthorized data modification, or complete system takeover. The vulnerability aligns with CWE-200, which addresses information exposure, and represents a classic case of credential leakage through improper access control mechanisms. Organizations may face regulatory compliance violations, data breaches, and service disruption consequences when such vulnerabilities exist in their distributed caching infrastructure.
The security implications extend beyond immediate credential exposure to encompass broader system integrity threats. Attackers who obtain WAN replication credentials can potentially manipulate data flows between geographically distributed systems, create backdoor access points, or perform man-in-the-middle attacks on replication communications. This vulnerability particularly impacts organizations relying on distributed caching architectures where data consistency across multiple regions is critical. The exposure through public routes indicates that the system lacks proper network segmentation and access control enforcement, creating opportunities for attackers to escalate privileges and expand their attack surface.
Mitigation strategies for CVE-2016-8220 require immediate implementation of several security controls including upgrading to affected versions 1.6.5.0 or 1.7.1.0 where the vulnerability has been patched. Organizations should implement proper credential management practices, ensuring that authentication materials are never exposed through public interfaces and are properly encrypted both in transit and at rest. Network segmentation and access control policies must be enforced to prevent unauthorized access to replication endpoints. Additionally, security monitoring should be enhanced to detect unauthorized access attempts and credential exposure events. The remediation process should align with NIST SP 800-53 security controls, particularly those addressing access control and information protection requirements. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in distributed systems and ensure proper implementation of secure coding practices throughout the application lifecycle.