CVE-2016-8939 in Spectrum Protect
Summary
by MITRE
IBM Tivoli Storage Manager (IBM Spectrum Protect 7.1 and 8.1) clients/agents store password information in the Windows Registry in a manner which can be compromised. IBM X-Force ID: 118790.
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Analysis
by VulDB Data Team • 10/04/2020
The vulnerability identified as CVE-2016-8939 affects IBM Tivoli Storage Manager clients and agents running on Windows systems, specifically versions 7.1 and 8.1. This security flaw represents a critical configuration weakness that exposes sensitive authentication credentials through improper storage mechanisms within the Windows operating system registry. The vulnerability stems from the client software's practice of persistently storing password information in registry locations that lack adequate protection mechanisms, creating a persistent attack surface that can be exploited by malicious actors with access to the affected system.
The technical implementation of this vulnerability involves the insecure handling of authentication credentials within the Windows registry structure. IBM Spectrum Protect clients store password information in registry keys that are accessible to processes running with appropriate privileges, typically including local administrators and system-level processes. This approach violates fundamental security principles for credential storage, as the registry entries containing passwords are not encrypted or adequately protected against unauthorized access. The flaw aligns with CWE-312, which addresses the exposure of sensitive information through improper storage of credentials, and represents a classic example of insecure credential management practices that have been documented in numerous security frameworks and compliance standards.
The operational impact of this vulnerability extends beyond simple credential exposure to encompass broader security implications for organizations relying on IBM Tivoli Storage Manager for data protection. Attackers who gain access to the Windows registry or obtain local system privileges can directly extract stored passwords, potentially enabling them to authenticate to storage systems, access backup repositories, and compromise the integrity of backup operations. This vulnerability particularly affects environments where multiple users or services interact with storage systems, as the compromised credentials could provide unauthorized access to critical backup data and storage resources. The risk is exacerbated by the fact that these credentials are typically stored with the system configuration, making them persistent across system reboots and user sessions, and potentially remaining accessible even when users believe they have logged out of the system.
Organizations should implement comprehensive mitigation strategies addressing this vulnerability through immediate registry hardening measures and credential management improvements. The most effective immediate response involves removing the vulnerable registry entries containing password information and implementing proper credential rotation procedures. System administrators should configure registry permissions to restrict access to sensitive keys containing authentication information, ensuring that only authorized processes can access these locations. Additionally, organizations should consider implementing additional authentication mechanisms such as certificate-based authentication or token-based systems to reduce reliance on password storage. The remediation efforts should align with industry best practices outlined in standards such as NIST SP 800-53 and ISO 27001, which emphasize the importance of secure credential handling and storage. Furthermore, this vulnerability demonstrates the importance of regular security assessments and configuration reviews to identify and address similar insecure storage practices across enterprise systems. The attack surface created by this vulnerability can be further reduced through network segmentation, privilege minimization, and regular monitoring for unauthorized registry access attempts, as outlined in the MITRE ATT&CK framework's credential access techniques. Organizations should also consider implementing automated tools to scan for and remediate similar credential storage vulnerabilities across their IT infrastructure.