CVE-2016-1915 in Enterprise Service
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in BlackBerry Enterprise Server 12 (BES12) Self-Service before 12.4 allow remote attackers to inject arbitrary web script or HTML via the locale parameter to (1) mydevice/index.jsp or (2) mydevice/loggedOut.jsp.
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Analysis
by VulDB Data Team • 08/16/2024
The vulnerability identified as CVE-2016-1915 represents a critical cross-site scripting flaw discovered in BlackBerry Enterprise Server 12 version prior to 12.4. This vulnerability affects the Self-Service component of the enterprise mobile device management platform, specifically targeting two key endpoints: mydevice/index.jsp and mydevice/loggedOut.jsp. The flaw resides in the improper handling of the locale parameter, which allows remote attackers to inject malicious web scripts or HTML content into the application's response. This type of vulnerability falls under CWE-79 which defines Cross-Site Scripting as a weakness where an application fails to properly validate or escape user-supplied input before incorporating it into dynamically generated web pages.
The technical exploitation of this vulnerability occurs through manipulation of the locale parameter within the specified jsp endpoints, enabling attackers to execute arbitrary scripts in the context of the victim's browser session. When a user accesses either of these endpoints with a maliciously crafted locale parameter, the server processes the input without adequate sanitization, resulting in the injection of malicious code that executes in the victim's browser. This creates a persistent threat vector that can be leveraged for session hijacking, credential theft, or redirection to malicious websites. The vulnerability demonstrates poor input validation practices and inadequate output encoding mechanisms that are fundamental requirements in secure web application development.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to compromise user sessions within the BlackBerry Enterprise environment. In enterprise settings where BES12 is deployed for mobile device management, successful exploitation could lead to unauthorized access to corporate data, device control, and potential lateral movement within the network. Attackers could leverage this vulnerability to establish persistent access to employee devices, potentially gaining access to sensitive corporate information, email communications, and other enterprise resources. The vulnerability's remote nature means that attackers do not require physical access to devices or network proximity to exploit the flaw, making it particularly dangerous in distributed enterprise environments.
Organizations utilizing BlackBerry Enterprise Server 12 should prioritize immediate remediation through the installation of the 12.4 patch or later versions that address this vulnerability. The mitigation strategy should include implementing proper input validation and output encoding mechanisms for all user-supplied parameters, particularly those used in dynamic content generation. Network segmentation and monitoring should be enhanced to detect anomalous parameter usage patterns that may indicate exploitation attempts. Additionally, security awareness training should be conducted to educate users about the risks of clicking suspicious links or visiting untrusted websites that may trigger the XSS payload. This vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, specifically JavaScript, and demonstrates the importance of following secure coding practices as outlined in OWASP Top Ten and NIST SP 800-53 security controls. The remediation process should also include thorough code review to ensure similar input validation weaknesses do not exist in other application components, particularly those handling user-provided data in web interfaces.