CVE-2018-18571 in XenMobile Server
Summary
by MITRE
An Incorrect Access Control vulnerability has been identified in Citrix XenMobile Server 10.8.0 before Rolling Patch 6 and 10.9.0 before Rolling Patch 3. An attacker can impersonate and take actions on behalf of any Mobile Application Management (MAM) enrolled device.
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Analysis
by VulDB Data Team • 09/28/2023
The vulnerability CVE-2018-18571 represents a critical access control flaw in Citrix XenMobile Server versions 10.8.0 prior to Rolling Patch 6 and 10.9.0 prior to Rolling Patch 3. This issue falls under the CWE-284 access control weakness category, specifically involving improper access control mechanisms that allow unauthorized entities to escalate privileges and assume the identity of managed mobile devices. The vulnerability exists within the Mobile Application Management component of the XenMobile platform, which is designed to secure enterprise mobile applications and data through device enrollment and policy enforcement.
The technical exploitation of this vulnerability enables an attacker to impersonate any MAM-enrolled device within the system, fundamentally compromising the integrity of the mobile device management infrastructure. This flaw occurs due to inadequate authentication checks and authorization mechanisms within the server's API endpoints that handle device management operations. Attackers can leverage this vulnerability to perform actions such as device wipe commands, policy enforcement modifications, application installation or removal, and access to device data that should be restricted to authorized administrators or users. The vulnerability essentially allows for privilege escalation from a regular user or unauthenticated attacker to full device management capabilities, bypassing the normal security boundaries that protect enrolled devices.
The operational impact of this vulnerability is severe and far-reaching for organizations relying on Citrix XenMobile for mobile device management. Enterprise environments utilizing this platform face significant risks including unauthorized access to corporate mobile devices, potential data breaches through device compromise, and loss of control over managed applications and policies. The attack surface extends beyond individual device compromise to encompass entire mobile device management ecosystems, potentially affecting thousands of enrolled devices simultaneously. Organizations may experience regulatory compliance violations, financial losses, and reputational damage due to the exposure of sensitive corporate data and the inability to maintain proper mobile device governance. This vulnerability directly impacts the CIA triad by compromising confidentiality, integrity, and availability of mobile device management services.
Mitigation strategies for CVE-2018-18571 should prioritize immediate implementation of available patches from Citrix, specifically Rolling Patch 6 for version 10.8.0 and Rolling Patch 3 for version 10.9.0. Organizations should also implement network segmentation to limit access to XenMobile server components, enforce strict authentication controls, and monitor for suspicious API activity that may indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1078 legitimate credentials for privilege escalation and T1566 credential harvesting through network reconnaissance. Security teams should conduct comprehensive audits of enrolled devices, review access control policies, and implement additional monitoring controls around device management API endpoints to detect potential exploitation attempts. The remediation process should include thorough testing of patches in staging environments before production deployment to ensure system stability and prevent service disruption while addressing the critical access control weakness that allows unauthorized impersonation of managed devices.