CVE-2017-8196 in FusionSphere
Summary
by MITRE
FusionSphere V100R006C00SPC102(NFV) has an incorrect authorization vulnerability. An authenticated attacker could execute commands that he/she should have had no permission to perform, thereby querying, modifying, and deleting certain service data and making the service unavailable.
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Analysis
by VulDB Data Team • 01/16/2023
The FusionSphere V100R006C00SPC102 (NFV) system contains a critical authorization flaw that allows authenticated attackers to escalate their privileges and execute unauthorized operations. This vulnerability represents a significant security weakness in the network function virtualization infrastructure component, where proper access controls have been bypassed. The flaw enables malicious users who have already established authentication credentials to perform actions that should be restricted to authorized administrative personnel only. This incorrect authorization mechanism creates a path for privilege escalation attacks that can compromise the integrity and availability of the virtualized network services.
The technical implementation of this vulnerability stems from insufficient validation of user permissions within the system's access control framework. Attackers can exploit this weakness to execute commands that would normally be restricted to higher-privileged users, effectively bypassing the intended security boundaries. The affected system allows unauthorized data manipulation through command execution capabilities that should require elevated permissions. This flaw operates at the authorization layer of the security model, where the system fails to properly verify that authenticated users possess the necessary privileges for specific operations. The vulnerability can be categorized under CWE-285 which addresses improper authorization issues in software systems.
The operational impact of this vulnerability is severe and multifaceted, affecting the confidentiality, integrity, and availability of the virtualized network services. An attacker with access to the system can query sensitive service data that should remain protected, modify critical configuration parameters, and delete essential service components. This capability can result in complete service disruption and data loss, potentially affecting multiple network functions that depend on the FusionSphere infrastructure. The vulnerability also creates opportunities for persistent access and further exploitation within the network environment, as attackers can maintain unauthorized control over the affected system. The compromised availability aspect means that legitimate users may lose access to critical services, while the integrity compromise allows for unauthorized modifications to the system's operational state.
Organizations using this version of FusionSphere should immediately implement mitigations to address the authorization vulnerability. The primary recommendation involves applying the vendor-provided security patches and updates that correct the access control implementation. System administrators should conduct comprehensive privilege reviews to ensure that only authorized personnel maintain access to critical system functions. Network segmentation and monitoring should be enhanced to detect unauthorized command execution attempts. The implementation of principle of least privilege should be enforced more rigorously, ensuring that users have only the minimum permissions necessary for their operational roles. Additionally, regular security audits and penetration testing should be conducted to identify and remediate similar authorization weaknesses in the broader infrastructure. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation tactics used by adversaries to maintain persistent access within compromised systems.