CVE-2017-8134 in FusionSphere OpenStack
Summary
by MITRE
The FusionSphere OpenStack with software V100R006C00 and V100R006C10 has a command injection vulnerability due to the insufficient input validation on four TCP listening ports. An unauthenticated attacker can exploit the vulnerabilities to gain root privileges by sending some messages with malicious commands.
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Analysis
by VulDB Data Team • 01/11/2023
The FusionSphere OpenStack vulnerability identified as CVE-2017-8134 represents a critical command injection flaw affecting software versions V100R006C00 and V100R006C10. This vulnerability manifests through inadequate input validation mechanisms implemented across four specific TCP listening ports within the OpenStack infrastructure. The flaw stems from insufficient sanitization of user-supplied data, creating an avenue for malicious actors to execute arbitrary commands on the affected system. The vulnerability is particularly concerning because it operates without requiring authentication, making it accessible to any external attacker who can establish connections to the vulnerable ports. This type of vulnerability falls under CWE-77 and CWE-94 categories, representing command injection and code injection weaknesses respectively, which are fundamental security flaws that can lead to complete system compromise.
The technical exploitation of this vulnerability involves an attacker sending specially crafted messages containing malicious commands through the vulnerable TCP ports. These commands are then processed by the system without proper validation, allowing the attacker to execute arbitrary code with the privileges of the affected service. The most severe aspect of this vulnerability is the potential for privilege escalation to root level access, which would provide complete control over the underlying system. The attack vector specifically targets the TCP listening ports where the input validation is deficient, making these communication endpoints the primary attack surface. This vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation, demonstrating how the initial access through command injection can be leveraged for further system compromise.
The operational impact of CVE-2017-8134 extends beyond simple unauthorized access, as it fundamentally compromises the integrity and confidentiality of the entire OpenStack deployment. An attacker who successfully exploits this vulnerability can gain complete control over virtual machine instances, storage resources, and network configurations managed by the FusionSphere platform. The lack of authentication requirements means that this vulnerability can be exploited remotely without any prior credentials, making it particularly dangerous in cloud environments where systems may be exposed to public networks. Organizations using these affected versions face significant risk of data breaches, service disruption, and potential regulatory compliance violations. The vulnerability's impact is amplified in multi-tenant cloud environments where a compromised system could potentially affect multiple users and their workloads.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected systems to the latest software versions that address the input validation deficiencies. Organizations must also implement network segmentation and access controls to restrict access to the vulnerable TCP ports, limiting exposure to only authorized management interfaces. Network monitoring should be enhanced to detect suspicious traffic patterns that may indicate exploitation attempts, particularly around the identified vulnerable ports. Regular security assessments and penetration testing should be conducted to identify similar validation weaknesses in other system components. Additionally, implementing proper input sanitization and output encoding mechanisms across all network services can prevent similar vulnerabilities from emerging in the future. The remediation process should also include comprehensive log analysis to identify any potential exploitation attempts that may have occurred prior to patching, as this vulnerability could have been leveraged for extended periods without detection.