CVE-2017-8193 in FusionSphere OpenStack
Summary
by MITRE
The FusionSphere OpenStack V100R006C00SPC102(NFV) has a command injection vulnerability. Due to the insufficient input validation on one port, an authenticated, local attacker may exploit the vulnerability to gain root privileges by sending message with malicious commands.
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Analysis
by VulDB Data Team • 01/16/2023
The FusionSphere OpenStack V100R006C00SPC102(NFV) platform presents a critical command injection vulnerability identified as CVE-2017-8193 that stems from inadequate input validation mechanisms within its network communication stack. This vulnerability specifically affects one network port where the system fails to properly sanitize incoming data inputs, creating an exploitable condition that allows authenticated local attackers to execute arbitrary commands with elevated privileges. The flaw exists within the system's message processing pipeline where user-supplied data is directly incorporated into system commands without proper validation or sanitization measures.
The technical exploitation of this vulnerability follows a well-defined attack pattern where an attacker with legitimate authentication credentials can leverage the insufficient input validation to inject malicious commands into the targeted port. This command injection occurs because the system's input processing logic does not adequately filter or escape special characters that could alter the intended execution flow of system commands. The vulnerability enables privilege escalation from standard user level to root privileges, representing a severe security degradation that undermines the system's integrity and confidentiality controls. According to CWE classification, this vulnerability maps to CWE-77 which specifically addresses command injection flaws that occur when untrusted data is used to construct command strings without proper sanitization.
The operational impact of CVE-2017-8193 extends beyond simple privilege escalation to encompass complete system compromise and potential data exfiltration. An attacker who successfully exploits this vulnerability gains root access to the OpenStack environment, enabling them to manipulate virtual machine configurations, access sensitive customer data, modify network policies, and potentially establish persistent backdoors within the infrastructure. The local authentication requirement reduces the attack surface compared to remote exploits but still represents a significant risk since legitimate users with access credentials could be compromised through credential theft or insider threats. This vulnerability directly aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and T1059 which addresses 'Command and Scripting Interpreter' where adversaries execute malicious commands to gain unauthorized access.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and sanitization measures across all network ports and message processing components. Organizations must ensure that all user-supplied data undergoes strict validation before being processed or incorporated into system commands. The recommended approach includes implementing proper parameterized command execution, input filtering, and output encoding to prevent malicious command injection attempts. Additionally, system administrators should implement principle of least privilege access controls, regularly audit user permissions, and monitor for anomalous command execution patterns. The vendor should provide immediate patches and updates to address the input validation deficiencies, while security teams should conduct thorough vulnerability assessments to identify similar weaknesses in related components of the FusionSphere platform. Network segmentation and intrusion detection systems should be deployed to monitor for suspicious command execution patterns and potential exploitation attempts.