CVE-2023-51699 in fluid
Summary
by MITRE • 03/15/2024
Fluid is an open source Kubernetes-native Distributed Dataset Orchestrator and Accelerator for data-intensive applications. An OS command injection vulnerability within the Fluid project's JuicefsRuntime can potentially allow an authenticated user, who has the authority to create or update the K8s CRD Dataset/JuicefsRuntime, to execute arbitrary OS commands within the juicefs related containers. This could lead to unauthorized access, modification or deletion of data. Users who're using versions < 0.9.3 with JuicefsRuntime should upgrade to v0.9.3.
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Analysis
by VulDB Data Team • 03/15/2024
The vulnerability CVE-2023-51699 represents a critical operating system command injection flaw within the Fluid project's JuicefsRuntime component, which operates as a Kubernetes-native distributed dataset orchestrator and accelerator. This issue specifically affects the JuicefsRuntime custom resource definition within Kubernetes environments, where authenticated users with sufficient privileges can manipulate the system through crafted Dataset or JuicefsRuntime objects. The vulnerability stems from inadequate input validation and sanitization mechanisms within the Fluid project's codebase, allowing malicious command sequences to be injected and subsequently executed within the juicefs-related containers that operate within the Kubernetes cluster. Such a flaw exists at the intersection of Kubernetes custom resource definitions and distributed storage orchestration, creating a dangerous attack surface that can be exploited by threat actors with legitimate access credentials.
The technical exploitation of this vulnerability occurs when an authenticated user with permissions to create or update Kubernetes CRDs can inject malicious commands through the JuicefsRuntime configuration parameters. This command injection vulnerability maps directly to CWE-77 and CWE-78 within the Common Weakness Enumeration framework, specifically targeting improper input validation and OS command execution flaws. The attack vector leverages the legitimate administrative capabilities of the Fluid project to execute arbitrary operating system commands within the juicefs containers, potentially compromising the entire data processing pipeline. The vulnerability is particularly concerning because it operates within the Kubernetes environment where the JuicefsRuntime component executes with elevated privileges, allowing for lateral movement and data manipulation across the cluster. The flaw essentially transforms a legitimate administrative function into a potential weapon for unauthorized data access and modification.
The operational impact of CVE-2023-51699 extends beyond simple command execution, potentially leading to complete compromise of data integrity and confidentiality within Kubernetes environments that utilize Fluid's JuicefsRuntime. An attacker with access to create or modify Dataset/JuicefsRuntime objects could execute commands that modify, delete, or exfiltrate data stored in juicefs volumes, effectively bypassing traditional security controls. This vulnerability directly violates the principle of least privilege by allowing authenticated users to escalate their privileges to system-level command execution, which aligns with ATT&CK technique T1059.001 for command and scripting interpreter. The impact is particularly severe in data-intensive applications where juicefs containers handle sensitive datasets, as the vulnerability can be exploited to gain unauthorized access to critical business data, potentially leading to compliance violations and significant financial losses.
Organizations utilizing Fluid versions prior to 0.9.3 with JuicefsRuntime functionality face immediate security risk and must implement urgent remediation measures. The recommended mitigation strategy involves upgrading to Fluid version 0.9.3 or later, which contains patched input validation mechanisms that prevent command injection attacks. Additionally, implementing strict RBAC policies to limit the creation and modification of Dataset and JuicefsRuntime objects can significantly reduce the attack surface. Security teams should also consider implementing monitoring solutions that detect anomalous command execution patterns within juicefs containers and establish network segmentation to limit lateral movement. The vulnerability demonstrates the importance of validating all user inputs in Kubernetes custom resource definitions and highlights the need for comprehensive security testing of open source projects before deployment in production environments. Organizations should also conduct thorough security audits of their Kubernetes workloads to identify other potential command injection vulnerabilities in similar distributed storage orchestration tools.