CVE-2017-16609 in Enterprise Manager
Summary
by MITRE
This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Netgain Enterprise Manager. Authentication is not required to exploit this vulnerability. The specific flaw exists within download.jsp. The issue results from the lack of proper validation of a user-supplied string before using it to download a file. An attacker can leverage this vulnerability to expose sensitive information. Was ZDI-CAN-4750.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/26/2019
The vulnerability identified as CVE-2017-16609 represents a critical information disclosure flaw within the Netgain Enterprise Manager software ecosystem. This vulnerability operates at the application layer and specifically targets the download.jsp component, which serves as a critical interface for file handling operations. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied strings before processing file download requests. This design oversight creates an exploitable condition where malicious actors can manipulate the file download functionality to access unauthorized resources. The vulnerability's severity is amplified by its accessibility requirements, as no authentication credentials are necessary to exploit the flaw, making it particularly dangerous in environments where the application remains accessible to unauthenticated users.
The technical implementation of this vulnerability manifests through improper validation of user-supplied input within the download.jsp script, which directly correlates to CWE-20, or Improper Input Validation. This weakness allows attackers to inject malicious file paths or filenames that bypass normal access controls and directory traversal restrictions. When the application processes these unvalidated inputs, it executes file download operations against arbitrary locations within the file system, potentially exposing sensitive configuration files, database credentials, log files, or other confidential data. The vulnerability's exploitation pathway follows a classic path where attackers can manipulate the download functionality to retrieve files that should normally be restricted to authorized personnel only, effectively creating a backdoor for information extraction without requiring any authentication mechanisms.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can lead to comprehensive system compromise when combined with other attack vectors. Attackers leveraging this flaw can potentially access database connection strings, application configuration files, user credentials stored in plaintext, system logs, and other sensitive artifacts that could facilitate further exploitation. The vulnerability's remote exploitability means that attackers can initiate attacks from external networks without requiring physical access or prior system compromise, making it particularly attractive for large-scale reconnaissance operations. This information disclosure capability directly maps to multiple tactics within the attack lifecycle, including initial access, privilege escalation, and defense evasion, as the extracted information can be used to plan more sophisticated attacks against the compromised environment.
Organizations affected by this vulnerability should implement immediate mitigations including input validation enforcement for all file download operations, implementation of proper access controls for sensitive files, and network segmentation to limit exposure of vulnerable applications. The fix should involve comprehensive validation of all user-supplied inputs within the download.jsp component, ensuring that file paths are properly sanitized and restricted to authorized directories. Additionally, implementing proper authentication mechanisms and limiting access to the vulnerable application to trusted networks can significantly reduce the attack surface. Security teams should also conduct comprehensive audits of similar file handling components throughout their infrastructure to identify and remediate analogous vulnerabilities that may exist in other applications, as this pattern of improper input validation commonly occurs in enterprise software environments and aligns with attack patterns documented in the attack technique catalog for information gathering and reconnaissance activities.