CVE-2011-2756 in ServiceDesk Plus
Summary
by MITRE
FileDownload.jsp in ManageEngine ServiceDesk Plus 8.0 before Build 8012 does not require authentication, which allows remote attackers to read files from a specific directory via unspecified vectors.
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Analysis
by VulDB Data Team • 08/06/2024
The vulnerability identified as CVE-2011-2756 affects ManageEngine ServiceDesk Plus version 8.0 before build 8012 and represents a critical authentication bypass flaw that exposes sensitive file reading capabilities to unauthenticated remote attackers. This issue resides within the FileDownload.jsp component which serves as a file retrieval mechanism within the service desk application. The vulnerability stems from improper access control implementation where the application fails to validate user credentials before permitting file operations, creating a direct pathway for malicious actors to access restricted file systems.
The technical implementation flaw manifests as a missing authentication check within the FileDownload.jsp servlet, which operates without requiring valid user sessions or authorization tokens. Attackers can exploit this weakness by directly accessing the file download endpoint with crafted requests that target specific directory paths within the application's file system. The unspecified vectors suggest that the vulnerability may be exploitable through multiple attack methods including direct URL manipulation, parameter injection, or other request manipulation techniques that bypass normal authentication flows. This represents a classic example of insecure direct object reference vulnerability where the application provides direct access to internal objects without proper authorization checks.
The operational impact of this vulnerability extends beyond simple information disclosure as it enables attackers to access potentially sensitive data including configuration files, database connection details, application source code, and other system artifacts that could facilitate further exploitation. The ability to read files from specific directories creates opportunities for attackers to gather intelligence about the underlying system architecture, identify potential weaknesses in the application's configuration, and potentially discover additional vulnerabilities that could lead to complete system compromise. This vulnerability directly aligns with CWE-284 which describes improper access control issues, and falls under the ATT&CK technique T1213 for Data from Information Repositories, representing a significant threat to enterprise security infrastructure.
Organizations utilizing affected versions of ManageEngine ServiceDesk Plus should immediately implement mitigations including applying the vendor-provided patch or update to build 8012 or later, implementing network-level access controls to restrict access to the FileDownload.jsp endpoint, and conducting thorough security audits to identify any potential exploitation attempts. Additional defensive measures should include monitoring network traffic for suspicious requests targeting the vulnerable endpoint, implementing web application firewalls to detect and block malicious file access patterns, and establishing proper access controls that ensure only authorized personnel can access sensitive file systems. The vulnerability demonstrates the critical importance of proper authentication mechanisms and access control validation in web applications, particularly those handling enterprise service management functions where unauthorized access could lead to significant operational and security consequences.