CVE-2011-4714 in Muster
Summary
by MITRE
Directory traversal vulnerability in Virtual Vertex Muster before 6.20 allows remote attackers to read arbitrary files via a \.. (backslash dot dot) in the URL.
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Analysis
by VulDB Data Team • 06/24/2024
The vulnerability identified as CVE-2011-4714 represents a critical directory traversal flaw within the Virtual Vertex Muster software version 6.19 and earlier. This issue stems from inadequate input validation mechanisms that fail to properly sanitize URL parameters containing directory traversal sequences. The vulnerability specifically manifests when the application processes URLs containing backslash dot dot sequences, which are commonly used to navigate up directory levels in file systems. Attackers can exploit this weakness by crafting malicious URLs that include \.. patterns to access files outside the intended directory structure. The flaw exists at the application layer where user-supplied input is directly processed without proper sanitization, creating an avenue for unauthorized file access. This type of vulnerability falls under the Common Weakness Enumeration category CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, also known as path traversal or directory traversal. The vulnerability operates at the HTTP protocol level where the application fails to properly validate or sanitize URL components before processing them, allowing attackers to manipulate the file system access paths through crafted requests.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access sensitive files that may contain configuration data, user credentials, application source code, or other confidential information stored on the server. When exploited, the vulnerability enables remote attackers to read arbitrary files from the file system, potentially compromising the entire application environment. The attack vector is particularly concerning because it requires no authentication and can be executed remotely, making it highly dangerous in production environments where the application may be exposed to untrusted networks. The vulnerability affects the integrity and confidentiality of the system by allowing unauthorized access to files that should remain protected within the application's designated directory structure. This weakness creates a persistent threat that can be exploited repeatedly, as the underlying code validation issue remains unresolved until the software is updated to version 6.20 or later. The vulnerability demonstrates a fundamental flaw in the application's security architecture where input validation occurs too late in the processing pipeline, allowing malicious input to propagate through the system before proper sanitization takes place.
Mitigation strategies for this vulnerability center around updating the Virtual Vertex Muster software to version 6.20 or later, which contains the necessary patches to address the directory traversal issue. Organizations should implement immediate patch management procedures to ensure all affected systems receive the update without delay. Additional protective measures include implementing web application firewalls that can detect and block directory traversal patterns in incoming requests, configuring proper input validation at multiple layers of the application architecture, and establishing strict access controls that limit file system permissions for the application process. Network segmentation and monitoring solutions should be deployed to detect unusual file access patterns that may indicate exploitation attempts. The vulnerability highlights the importance of following secure coding practices such as those outlined in the OWASP Top Ten and the CERT Secure Coding Standards, which emphasize the need for proper input validation and the principle of least privilege. Security teams should conduct regular vulnerability assessments to identify similar weaknesses in other applications and ensure that all software components maintain current security patches. The remediation process should include thorough testing of the patched version to verify that the directory traversal vulnerability has been fully resolved while ensuring that legitimate application functionality remains intact. Organizations should also consider implementing automated security scanning tools that can detect such vulnerabilities during the software development lifecycle and prevent similar issues from being introduced in future releases.