CVE-2017-11511 in ServiceDesk
Summary
by MITRE
The ManageEngine ServiceDesk 9.3.9328 is vulnerable to arbitrary file downloads due to improper restrictions of the pathname used in the filepath parameter for the download-file URL. An unauthenticated remote attacker can use this vulnerability to download arbitrary files.
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Analysis
by VulDB Data Team • 03/26/2020
The ManageEngine ServiceDesk 9.3.9328 contains a critical directory traversal vulnerability that allows unauthenticated remote attackers to access arbitrary files on the underlying file system through improper input validation in the download-file URL endpoint. This vulnerability stems from insufficient restrictions on the filepath parameter, which enables attackers to manipulate the requested file path and bypass normal access controls. The flaw exists within the application's file download functionality where user-supplied input is directly incorporated into file system operations without adequate sanitization or validation. The vulnerability is classified as a directory traversal issue that aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. Attackers can exploit this weakness by crafting malicious URLs that include directory traversal sequences such as ../ or ..\ to navigate outside the intended download directory and access sensitive files including configuration files, database credentials, application source code, and other system resources. The impact of this vulnerability extends beyond simple information disclosure as it can lead to complete system compromise when combined with other exploitation techniques. According to the MITRE ATT&CK framework, this vulnerability maps to technique T1213.002 for Data from Information Repositories, as it enables unauthorized access to stored data and system information. The vulnerability is particularly dangerous because it affects a web-based service management platform that typically runs with elevated privileges and may contain sensitive business data, user credentials, and system configuration details. Organizations running this version of ServiceDesk are at risk of data breaches, privilege escalation, and potential lateral movement within their network infrastructure. The lack of authentication requirements for exploitation makes this vulnerability particularly severe as it can be leveraged by anyone with access to the network. The vulnerability represents a fundamental flaw in the application's input validation and access control mechanisms, where the system fails to properly validate user input before using it in file system operations. This weakness creates a path for attackers to bypass normal file system access controls and retrieve files that should remain protected. The attack surface includes not only sensitive application files but potentially system-level files that could provide attackers with additional information for further exploitation. The vulnerability's exploitation requires minimal technical skill and can be automated, making it a preferred target for both targeted attacks and automated scanning campaigns. Organizations should immediately implement mitigations including input validation, access control restrictions, and application updates to prevent exploitation. The vulnerability demonstrates the critical importance of proper input validation and the principle of least privilege in web application security, where all user-supplied data should be carefully validated and sanitized before being used in system operations.