CVE-2016-2789 in XenMobile Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Web User Interface in Citrix XenMobile Server 10.0, 10.1 before Rolling Patch 4, and 10.3 before Rolling Patch 1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/01/2019
The CVE-2016-2789 vulnerability represents a critical cross-site scripting flaw within the web user interface of Citrix XenMobile Server versions 10.0, 10.1 prior to Rolling Patch 4, and 10.3 prior to Rolling Patch 1. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is a fundamental web application security weakness that allows attackers to inject malicious scripts into web pages viewed by other users. The affected Citrix XenMobile Server platform serves as a mobile device management solution that enables organizations to manage and secure mobile devices within enterprise environments, making this vulnerability particularly concerning for organizations relying on this technology for their mobile security infrastructure.
The technical nature of this vulnerability stems from insufficient input validation and output encoding within the web interface components of the XenMobile Server. Attackers can exploit this weakness by crafting malicious payloads that are then executed in the context of other users' browsers when they interact with the compromised web application. The unspecified vectors suggest that multiple entry points within the web interface could be leveraged for exploitation, potentially including form fields, URL parameters, or other user-controllable inputs that are not properly sanitized before being rendered back to users. This type of vulnerability typically occurs when web applications fail to adequately escape or validate user-supplied data before incorporating it into dynamic web content.
The operational impact of CVE-2016-2789 extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, data theft, privilege escalation, and redirection to malicious websites. In enterprise environments using Citrix XenMobile Server, this vulnerability could allow attackers to gain unauthorized access to mobile device management functionalities, potentially compromising the security of thousands of managed devices. The attack surface is particularly broad given that XenMobile Server is designed to manage corporate mobile devices, making it a valuable target for adversaries seeking to exploit organizational mobile security infrastructure. The vulnerability could be exploited by remote attackers without requiring any authentication, making it especially dangerous in environments where the web interface is accessible from untrusted networks.
Mitigation strategies for CVE-2016-2789 should prioritize immediate patching of affected Citrix XenMobile Server versions with the respective rolling patches that address this vulnerability. Organizations should also implement comprehensive input validation and output encoding mechanisms within their web applications to prevent similar issues in the future. Network segmentation and access controls can provide additional layers of protection by limiting exposure of the vulnerable web interface to untrusted networks. The vulnerability aligns with ATT&CK technique T1566 for phishing and T1071 for application layer protocol usage, as attackers could leverage this weakness to deliver malicious payloads to unsuspecting users. Security teams should also consider implementing web application firewalls and monitoring for suspicious user agent strings or payload patterns that could indicate exploitation attempts. Regular security assessments and vulnerability scanning of mobile device management platforms are essential to identify and remediate similar weaknesses before they can be exploited by threat actors.