CVE-2020-4631 in Spectrum Protect Plus
Summary
by MITRE
IBM Spectrum Protect Plus 10.1.0 through 10.1.6 agent files, in non-default configurations, on Windows are assigned access to everyone with full control permissions, which could allow a local user to cause interruption of the service operations. IBM X-Force ID: 185372.
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Analysis
by VulDB Data Team • 11/07/2020
IBM Spectrum Protect Plus represents a comprehensive data protection solution designed to safeguard enterprise environments through automated backup and recovery capabilities. The vulnerability identified in versions 10.1.0 through 10.1.6 affects the Windows agent implementation where specific agent files are configured with overly permissive access controls. This flaw manifests when the system operates in non-default configurations, indicating that the standard security settings have been modified or bypassed by administrators. The root cause involves the assignment of full control permissions to the Everyone group, a fundamental Windows security misconfiguration that grants unrestricted access to critical system components. This vulnerability aligns with CWE-276, which addresses improper file permissions, and represents a classic privilege escalation vector that can be exploited by local users without requiring elevated privileges. The operational impact of this vulnerability extends beyond simple unauthorized access, as malicious actors could manipulate or corrupt agent files to disrupt service operations, potentially leading to complete system outages or data integrity compromises. Attackers leveraging this weakness could execute various malicious activities including but not limited to modifying backup configurations, injecting malicious code into agent processes, or creating persistent backdoors within the protection infrastructure. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the 'Access Token Manipulation' and 'File and Directory Permissions Modification' tactics. The IBM X-Force ID 185372 further validates the severity of this issue, indicating that it has been recognized within the security community as a significant risk to enterprise backup and recovery systems. Organizations utilizing IBM Spectrum Protect Plus in environments where local user access cannot be strictly controlled face heightened risk, as this vulnerability essentially removes the security boundary that should protect critical backup agent components from unauthorized modification. The non-default configuration aspect suggests that administrators may have intentionally modified security settings for operational convenience, inadvertently creating a security weakness that could be exploited by attackers with local access to the system.
The exploitation of this vulnerability demonstrates the critical importance of proper access control implementation in enterprise security solutions. When agent files are granted full control permissions to the Everyone group, the security model fails at its most fundamental level, providing no protection against local users who might attempt to compromise the system. This represents a failure in the principle of least privilege, where system components should only be granted the minimum permissions necessary to perform their intended functions. The vulnerability creates a pathway for both accidental and intentional damage to the backup infrastructure, potentially leading to complete loss of protection capabilities for critical enterprise data. Organizations may experience service interruptions ranging from minor disruptions to complete system failures, depending on the extent of malicious modification attempted by unauthorized users. The impact on business continuity is significant, as backup systems are often the last line of defense against data loss, and compromising these systems can leave organizations vulnerable to extended outages or complete data recovery failures. Security professionals should consider this vulnerability as part of a broader assessment of backup and recovery system security, examining not only the agent files but also the underlying configuration management processes that might lead to such permissive security settings. The remediation process requires immediate attention to correct file permissions and implement proper access controls that align with enterprise security policies and compliance requirements.
Mitigation strategies for this vulnerability should focus on immediate permission corrections combined with comprehensive security auditing of the entire backup infrastructure. System administrators must verify that all agent files and directories are configured with appropriate access controls, ensuring that only authorized users and processes have the necessary permissions to modify critical components. The implementation of mandatory access controls and regular security audits can help prevent similar misconfigurations from occurring in the future. Organizations should establish clear policies regarding default configurations and ensure that any modifications to security settings undergo proper review and approval processes. Additionally, the deployment of monitoring solutions that track file access and modification activities can provide early detection of unauthorized attempts to exploit this vulnerability. The remediation process should include verification that all agent files have been properly secured and that no unauthorized modifications have occurred during the vulnerability assessment phase. Regular security training for system administrators can help prevent the introduction of such misconfigurations through better understanding of security best practices and the potential consequences of improper access control settings. The vulnerability also highlights the need for continuous security assessment of critical infrastructure components, ensuring that even well-established systems like backup solutions maintain appropriate security postures against evolving threat landscapes. Organizations should consider implementing automated configuration management tools that enforce security policies and prevent unauthorized changes to critical system components, thereby reducing the risk of human error leading to security vulnerabilities.