CVE-2019-9548 in Application Delivery Management
Summary
by MITRE
Citrix Application Delivery Management (ADM) 12.1.x before 12.1.50.33 has Incorrect Access Control.
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Analysis
by VulDB Data Team • 06/20/2020
Citrix Application Delivery Management version 12.1.x prior to 12.1.50.33 contains a critical access control vulnerability that allows unauthorized users to bypass authentication mechanisms and gain administrative privileges within the system. This flaw exists in the application delivery management console and affects organizations relying on Citrix ADM for load balancing and application delivery services. The vulnerability stems from insufficient validation of user permissions and improper authorization checks within the web interface, creating a pathway for malicious actors to escalate their privileges without proper authentication. Security researchers identified that the system fails to adequately verify user credentials when accessing certain administrative functions, enabling attackers to exploit this weakness and execute unauthorized operations.
The technical nature of this vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems. Attackers can leverage this weakness by crafting specific requests that bypass standard authentication flows, potentially gaining access to sensitive configuration data, modifying application delivery policies, or even compromising the entire underlying infrastructure. The flaw particularly affects the web-based management interface where users interact with the ADM console, making it accessible through standard web browsers. This vulnerability represents a significant risk to enterprise environments that depend on Citrix ADM for critical application delivery services, as it undermines the fundamental security controls designed to protect administrative functions.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can lead to complete system compromise when combined with other attack vectors. Organizations using affected Citrix ADM versions face potential data breaches, service disruptions, and unauthorized modifications to application delivery configurations that could affect thousands of users. The vulnerability is particularly concerning because it allows attackers to remain undetected while performing administrative actions, making it difficult to identify compromise through standard audit trails. This weakness creates opportunities for attackers to establish persistent access, modify critical network configurations, or even redirect traffic to malicious endpoints, effectively compromising the integrity and availability of application delivery services.
Organizations should immediately implement mitigations including applying the vendor-provided security patches released in version 12.1.50.33 and later, implementing network segmentation to limit access to ADM interfaces, and conducting comprehensive security assessments of their Citrix environments. Additional protective measures include enabling multi-factor authentication for administrative accounts, implementing strict access control policies, and monitoring for unusual administrative activities. Security teams should also consider deploying intrusion detection systems to monitor for exploitation attempts and ensure that all administrative interfaces are properly secured. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect critical infrastructure components. Organizations should review their existing security controls and ensure proper network access controls are in place to prevent unauthorized access to administrative interfaces. This vulnerability serves as a reminder of the critical importance of proper access control implementation and the potential consequences of inadequate authorization mechanisms in enterprise security systems.