CVE-2006-6573 in Access Gateway
Summary
by MITRE
Unspecified vulnerability in Citrix Access Gateway 4.5 Advanced Edition, and 4.2 with Advanced Access Control (AAC) 4.2, when deployed on the Access Gateway appliance 4.2 through 4.2.2 allows remote authenticated users to "gain access to data" and obtain sensitive information via unspecified vectors.
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Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2006-6573 represents a critical information disclosure weakness within Citrix Access Gateway implementations that affects versions 4.2 through 4.2.2 of the appliance software. This security flaw specifically impacts the Advanced Edition and Advanced Access Control configurations, creating a significant risk for organizations relying on these access gateway solutions for network security. The vulnerability's classification as unspecified indicates that the exact technical mechanism enabling the information disclosure remains partially obscured, though the implications for data security are well-established.
The technical nature of this vulnerability stems from inadequate access controls and data protection mechanisms within the Citrix Access Gateway appliance. Remote authenticated users who have already established legitimate access to the system can exploit this weakness to bypass normal security boundaries and access data that should remain protected. This represents a privilege escalation scenario where existing authenticated sessions can be leveraged to obtain unauthorized information access. The vulnerability's impact extends beyond simple data theft to potentially exposing sensitive organizational information including user credentials, system configurations, and network architecture details that could facilitate further attacks.
From an operational standpoint, this vulnerability creates substantial risk for enterprises utilizing Citrix Access Gateway solutions, particularly those with extensive remote access deployments. The fact that it affects multiple versions within the 4.2.x release series suggests a systemic flaw in the access control implementation rather than an isolated incident. Organizations may experience cascading security impacts as attackers use the obtained information to conduct more sophisticated attacks including lateral movement within networks, credential harvesting, and potentially full system compromise. The vulnerability's remote nature means that attackers do not require physical access to the network infrastructure, making it particularly dangerous for distributed organizations.
Security practitioners should consider this vulnerability in the context of the CWE (Common Weakness Enumeration) classification system, where such information disclosure issues typically map to CWE-200 or related weakness categories that focus on improper information access control. The ATT&CK framework would categorize this vulnerability under privilege escalation and credential access tactics, as adversaries could leverage authenticated sessions to extract sensitive data. Organizations should implement immediate mitigations including applying available patches from Citrix, implementing additional network segmentation, and monitoring for suspicious access patterns. The vulnerability also highlights the importance of regular security assessments and proper access control reviews within enterprise security architectures.
The broader implications of this vulnerability extend to compliance requirements and regulatory frameworks that mandate protection of sensitive data. Organizations may find their security posture weakened by this flaw, potentially leading to audit failures or regulatory penalties. Additionally, the unspecified nature of the attack vectors suggests that multiple exploitation techniques may be possible, requiring comprehensive monitoring and defensive measures. Security teams should conduct thorough risk assessments to determine the full scope of potential impacts within their specific environments, particularly focusing on the data classification levels and access controls that may be compromised by this vulnerability.