CVE-2016-3129 in Good Enterprise Mobility Server
Summary
by MITRE
A remote shell execution vulnerability in the BlackBerry Good Enterprise Mobility Server (GEMS) implementation of the Apache Karaf command shell in GEMS versions 2.1.5.3 to 2.2.22.25 allows remote attackers to obtain local administrator rights on the GEMS server via commands executed on the Karaf command shell.
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Analysis
by VulDB Data Team • 07/09/2019
The vulnerability identified as CVE-2016-3129 represents a critical remote code execution flaw within the BlackBerry Good Enterprise Mobility Server (GEMS) platform. This security weakness specifically targets the Apache Karaf command shell implementation that is embedded within GEMS versions ranging from 2.1.5.3 through 2.2.22.25. The affected system architecture leverages Apache Karaf as its underlying application container, which provides a robust framework for deploying and managing enterprise applications. However, this particular implementation contains a significant security gap that can be exploited by remote attackers to gain unauthorized access to the system. The vulnerability stems from insufficient authentication and authorization controls within the Karaf command shell interface, allowing malicious actors to execute arbitrary commands with elevated privileges. This flaw exists in the server-side implementation where the Karaf shell service is exposed without proper access controls, creating an attack surface that can be leveraged for privilege escalation and system compromise.
The technical exploitation of this vulnerability occurs through the manipulation of the Karaf command shell interface which is accessible over the network. Attackers can send specially crafted commands to the exposed shell service, bypassing normal authentication mechanisms and executing code with the privileges of the local administrator account. The flaw operates at the application layer where the Karaf shell service does not properly validate incoming commands or enforce proper access controls, allowing unauthenticated users to gain access to administrative functions. This represents a classic command injection vulnerability that falls under the CWE-77 category, specifically involving command injection in a remote shell environment. The vulnerability is particularly dangerous because it allows for immediate privilege escalation, enabling attackers to execute commands with the highest level of system access and potentially gain complete control over the GEMS server. The attack vector typically involves network-based exploitation where remote attackers can connect to the vulnerable service and issue administrative commands without proper authentication.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential data breaches. Organizations utilizing affected GEMS versions face significant risk of unauthorized data access, system manipulation, and potential lateral movement within their network infrastructure. The vulnerability can be exploited to establish persistent backdoors, modify system configurations, and access sensitive enterprise data stored within the mobile device management environment. From an enterprise security perspective, this flaw undermines the fundamental security posture of organizations relying on BlackBerry GEMS for mobile device management and enterprise mobility solutions. The compromise of a single GEMS server can potentially affect thousands of managed devices and create a significant attack surface for further exploitation. This vulnerability aligns with several ATT&CK tactics including privilege escalation and command and control, where attackers can use the compromised system as a pivot point for additional attacks within the enterprise network.
Organizations affected by CVE-2016-3129 should implement immediate mitigations including applying the vendor-provided security patches and updates to upgrade to patched versions of GEMS. The recommended approach involves upgrading to GEMS versions that have addressed the authentication and authorization flaws within the Apache Karaf implementation. Network segmentation and access control measures should be implemented to restrict access to the Karaf shell service, limiting exposure to only authorized administrative personnel. Additional protective measures include disabling unnecessary services, implementing strong network monitoring for suspicious command execution patterns, and conducting comprehensive security audits of the mobile device management infrastructure. Security teams should also consider implementing intrusion detection systems specifically configured to identify and alert on unauthorized command shell access attempts. The vulnerability demonstrates the importance of maintaining up-to-date security controls and proper access management within enterprise mobility solutions, as the flaw represents a failure in basic security principles such as least privilege access and proper authentication mechanisms. Organizations should also review their incident response procedures to ensure readiness for potential exploitation of this type of vulnerability within their mobile device management environments.