CVE-2011-4404 in vCenter Update Manager
Summary
by MITRE
The default configuration of the HTTP server in Jetty in vSphere Update Manager in VMware vCenter Update Manager 4.0 before Update 4 and 4.1 before Update 2 allows remote attackers to conduct directory traversal attacks and read arbitrary files via unspecified vectors, a related issue to CVE-2009-1523.
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Analysis
by VulDB Data Team • 09/01/2024
The vulnerability identified as CVE-2011-4404 represents a critical directory traversal flaw within the HTTP server implementation of Jetty that was embedded in VMware vCenter Update Manager versions 4.0 prior to Update 4 and 4.1 prior to Update 2. This issue stems from inadequate input validation and path handling mechanisms within the web server component, creating an avenue for remote attackers to manipulate file access requests. The vulnerability operates by exploiting the default configuration settings that fail to properly sanitize user-supplied input before processing file system requests. Attackers can construct malicious requests that bypass normal access controls and traverse directory structures to access files that should remain protected or restricted. This weakness specifically affects the Jetty-based HTTP server implementation within the vSphere Update Manager framework, making it particularly dangerous for organizations relying on VMware's virtualization management infrastructure.
The technical exploitation of this vulnerability follows established patterns documented in CWE-22, which categorizes directory traversal attacks as a fundamental security flaw in input validation. The flaw allows attackers to manipulate file path references through specially crafted HTTP requests that can navigate beyond the intended directory boundaries. This typically involves using sequences such as "../" or similar path manipulation techniques to move up directory levels and access files outside of the web application's intended scope. The vulnerability's relationship to CVE-2009-1523 demonstrates a persistent pattern in web server implementations where default configurations fail to adequately protect against path traversal attacks, indicating a systemic issue within the software's security architecture. The attack vector operates entirely through HTTP requests without requiring authentication, making it particularly dangerous for systems accessible over networks.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can potentially lead to complete system compromise when combined with other attack vectors. Remote attackers can access sensitive configuration files, credential storage locations, and potentially system files that contain administrative privileges or encryption keys. Organizations using affected vCenter Update Manager versions face significant risk of unauthorized access to their virtualization management infrastructure, which could lead to data breaches, system manipulation, or further lateral movement within the network. The default configuration nature of this vulnerability means that systems are inherently vulnerable without any additional configuration changes, making it particularly dangerous for enterprise environments where security through configuration is not properly implemented. The impact is amplified in virtualized environments where the Update Manager serves as a critical component for patch management and system maintenance operations.
Mitigation strategies for CVE-2011-4404 primarily focus on applying the vendor-provided security updates that address the directory traversal vulnerability in the embedded Jetty server. Organizations should immediately upgrade to VMware vCenter Update Manager 4.0 Update 4 or 4.1 Update 2, which contain the necessary patches to resolve the path traversal issue. Network segmentation and firewall rules can provide additional protection by restricting access to the Update Manager service to only trusted administrative networks. Implementing web application firewalls that can detect and block directory traversal patterns offers another layer of defense, though this approach is less reliable than proper patching. Regular security audits should verify that no unnecessary files or services are accessible through the web interface, and access controls should be reviewed to ensure minimal privilege exposure. Organizations should also consider implementing monitoring solutions that can detect anomalous file access patterns that might indicate exploitation attempts, aligning with ATT&CK technique T1078 for valid accounts and T1566 for credential access through network attacks. The vulnerability demonstrates the importance of keeping embedded components updated and highlights the need for proper security configuration management throughout the software lifecycle.