CVE-2016-5946 in Spectrum Control
Summary
by MITRE
Directory traversal vulnerability in IBM Spectrum Control (formerly Tivoli Storage Productivity Center) 5.2.x before 5.2.11 allows remote authenticated users to read arbitrary files via a .. (dot dot) in a URL.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 04/26/2019
The vulnerability CVE-2016-5946 represents a critical directory traversal flaw in IBM Spectrum Control, formerly known as Tivoli Storage Productivity Center, affecting versions 5.2.x prior to 5.2.11. This issue enables remote authenticated attackers to access arbitrary files on the system by exploiting a simple yet dangerous input manipulation technique involving the .. (dot dot) sequence in Uniform Resource Locators. The vulnerability stems from insufficient validation of user-supplied input in the application's web interface, specifically within the URL parsing mechanism that handles file path references. Attackers can leverage this weakness to bypass normal access controls and retrieve sensitive information from the server's file system, potentially including configuration files, database credentials, or other confidential data that should remain protected. The flaw exists at the application layer where the system fails to properly sanitize or validate path traversal sequences, allowing malicious users to navigate outside the intended directory structure and access files they should not be permitted to read.
The technical implementation of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. This weakness occurs when an application uses user-supplied data to construct file paths without adequate validation or sanitization, creating opportunities for attackers to manipulate the intended file access behavior. The vulnerability operates at the web application level where HTTP requests containing specially crafted URLs with .. sequences are processed without proper input validation. When the application processes these requests, it fails to normalize or validate the path components, allowing the traversal to occur. The authenticated nature of the attack means that an attacker must first establish valid credentials to exploit the vulnerability, but once authenticated, they can potentially access any file that the application process has read permissions for, significantly expanding the attack surface.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can lead to complete system compromise when combined with other attack vectors. An attacker with access to the application can potentially retrieve critical system files, configuration data, or database credentials that could facilitate further attacks, including privilege escalation or lateral movement within the network. The vulnerability affects IBM Spectrum Control's web interface, which typically handles administrative functions and storage management operations, making it a prime target for attackers seeking to gain unauthorized access to storage infrastructure management systems. Additionally, the vulnerability can be exploited to access sensitive log files, backup configurations, or other system artifacts that may contain information about the underlying infrastructure, network topology, or security controls in place. The remote nature of the attack means that exploitation does not require physical access to the system, making it particularly dangerous for enterprise environments where such management interfaces are accessible over the network.
Organizations should implement immediate mitigations including applying the vendor-provided patch for IBM Spectrum Control version 5.2.11 or later, which addresses the directory traversal vulnerability through proper input validation and sanitization of URL parameters. Network segmentation and access controls should be enforced to limit access to the management interface to only authorized personnel, while also implementing monitoring and logging of suspicious URL access patterns that might indicate attempted exploitation. The implementation of web application firewalls can provide additional protection by filtering out malicious path traversal sequences before they reach the application server. Regular security assessments should include testing for similar vulnerabilities in other web applications and interfaces, as this type of flaw is common in enterprise systems. Organizations should also establish incident response procedures for detecting and responding to potential exploitation attempts, including monitoring for unusual file access patterns and implementing automated alerts for suspicious URL parameters. Compliance with industry standards such as the NIST Cybersecurity Framework and ISO 27001 requires organizations to maintain up-to-date security patches and implement proper access controls to prevent unauthorized file access through directory traversal vulnerabilities. The ATT&CK framework categorizes this vulnerability under T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) as attackers may use the retrieved information to craft more sophisticated attacks or establish persistence within the environment.