CVE-2016-8206 in Network Advisor
Summary
by MITRE
A Directory Traversal vulnerability in servlet SoftwareImageUpload in the Brocade Network Advisor versions released prior to and including 14.0.2 could allow remote attackers to write to arbitrary files, and consequently delete the files.
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Analysis
by VulDB Data Team • 05/13/2026
The CVE-2016-8206 vulnerability represents a critical directory traversal flaw within the Brocade Network Advisor software platform, specifically affecting versions through 14.0.2. This vulnerability resides in the SoftwareImageUpload servlet component, which handles file upload operations within the network management interface. The flaw stems from insufficient input validation and path sanitization mechanisms that fail to properly restrict file system access during image upload processes. Attackers can exploit this weakness by crafting malicious file paths that bypass normal directory boundaries, allowing them to target arbitrary locations on the server file system beyond the intended upload directories.
The technical implementation of this vulnerability follows a classic directory traversal pattern where user-supplied input containing directory navigation sequences such as ../ or ..\ is not adequately filtered or sanitized before being processed by the file system operations. When the SoftwareImageUpload servlet receives a file upload request, it processes the provided file path without proper validation, enabling attackers to manipulate the destination path to write files to sensitive system locations. This weakness directly maps to CWE-22, which defines improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability enables attackers to write files to arbitrary locations, potentially including system-critical directories, configuration files, or even executable components that could lead to privilege escalation.
The operational impact of CVE-2016-8206 extends beyond simple unauthorized file creation, as it provides attackers with the capability to delete critical files from the system. This dual functionality of file creation and deletion creates a significant risk for network administrators, as it allows for both data manipulation and potential system disruption. Attackers could overwrite configuration files, replace legitimate software components, or remove essential system files that could compromise network operations or facilitate further attacks. The vulnerability is particularly dangerous in network management contexts where Brocade Network Advisor serves as a central management platform for enterprise networks, as successful exploitation could compromise the integrity of network infrastructure management systems and potentially provide attackers with persistent access to network resources.
Mitigation strategies for CVE-2016-8206 should focus on implementing robust input validation and path sanitization measures within the affected servlet component. Organizations should immediately upgrade to Brocade Network Advisor versions that have addressed this vulnerability, as the vendor has released patches and updated releases that properly validate file paths and restrict upload operations to designated directories. Network segmentation and access controls should be implemented to limit exposure of the vulnerable management interface to trusted networks only. Additionally, implementing web application firewalls and security monitoring systems can help detect and prevent exploitation attempts by identifying suspicious file upload patterns and directory traversal sequences. The ATT&CK framework categorizes this vulnerability under T1059 for command and scripting interpreter and T1078 for valid accounts, as exploitation typically requires legitimate administrative access and can lead to persistent access through file manipulation. Organizations should also conduct comprehensive security assessments of their network management systems to identify similar vulnerabilities in other components and ensure proper input validation across all file handling operations within their infrastructure.