CVE-2017-9367 in Workspaces Server
Summary
by MITRE
A directory traversal vulnerability in the BlackBerry Workspaces Server could potentially allow an attacker to execute or upload arbitrary files, or reveal the content of arbitrary files anywhere on the web server by crafting a URL with a manipulated POST request.
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Analysis
by VulDB Data Team • 11/25/2019
The vulnerability identified as CVE-2017-9367 represents a critical directory traversal flaw within the BlackBerry Workspaces Server software that fundamentally compromises the security boundaries of the affected system. This weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data in web requests, creating an exploitable pathway for malicious actors to manipulate file access patterns. The vulnerability specifically manifests when the server processes POST requests containing crafted URLs that include directory traversal sequences such as ../ or ..\, allowing attackers to navigate beyond the intended web root directory and access arbitrary files or execute code on the underlying server infrastructure.
From a technical perspective, this directory traversal vulnerability operates at the application layer and directly violates the principle of least privilege by enabling unauthorized file system access. The flaw permits attackers to construct malicious requests that bypass normal access controls, potentially leading to full system compromise when combined with other exploitation techniques. The vulnerability's impact extends beyond simple information disclosure to include arbitrary code execution capabilities, making it particularly dangerous for enterprise environments where sensitive data resides on the affected servers. This type of vulnerability is categorized under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", which is a well-documented weakness in web application security that has been consistently exploited across various platforms and applications.
The operational impact of CVE-2017-9367 is severe and multifaceted, potentially allowing attackers to access sensitive corporate data, upload malicious files, or execute commands with the privileges of the web server process. Attackers could leverage this vulnerability to gain persistent access to the affected system, escalate privileges, or use the compromised server as a staging ground for further attacks within the network. The vulnerability's exploitation aligns with ATT&CK technique T1059.007 for command and script interpreter execution, as successful exploitation typically involves executing commands through the web interface. Organizations utilizing BlackBerry Workspaces Server would face significant risk of data breaches, system compromise, and potential regulatory violations if this vulnerability remains unpatched, particularly in environments where the server hosts confidential business information or personal data.
Mitigation strategies for this vulnerability should include immediate patch deployment from BlackBerry, as well as implementing network-level restrictions to limit access to the affected server. Organizations should also consider implementing web application firewalls that can detect and block directory traversal patterns in incoming requests, along with comprehensive monitoring of file access patterns and system logs for signs of exploitation attempts. Additional protective measures include restricting the privileges of the web server process, implementing proper input validation at all application layers, and conducting regular security assessments to identify similar vulnerabilities in other applications and systems. The vulnerability demonstrates the critical importance of input sanitization and proper access control implementation in web applications, aligning with security best practices outlined in standards such as NIST SP 800-53 and ISO 27001 for application security controls.