CVE-2024-43397 in apollo
Summary
by MITRE • 08/20/2024
Apollo is a configuration management system. A vulnerability exists in the synchronization configuration feature that allows users to craft specific requests to bypass permission checks. This exploit enables them to modify a namespace without the necessary permissions. The issue was addressed with an input parameter check which was released in version 2.3.0.
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Analysis
by VulDB Data Team • 08/27/2024
The vulnerability identified as CVE-2024-43397 affects Apollo, a widely-used configuration management system that enables organizations to centrally manage application configurations across different environments. This system serves as a critical component in modern software architectures, particularly within microservices environments where consistent and secure configuration distribution is paramount. The vulnerability resides within the synchronization configuration feature, which is designed to facilitate automated configuration updates and propagation across multiple system components. The affected functionality allows users to initiate configuration synchronization operations that should typically require specific authorization levels to modify namespace settings. This represents a significant security weakness in the system's access control mechanisms.
The technical flaw manifests as a failure in input validation within the synchronization configuration feature. Attackers can construct specially crafted requests that bypass the normal permission checking procedures implemented by the system. This vulnerability specifically targets the authorization controls that should prevent unauthorized modifications to namespaces, which are fundamental organizational units within Apollo's configuration hierarchy. The flaw allows malicious actors to escalate their privileges through carefully crafted API calls that circumvent the standard authentication and authorization checks. This type of vulnerability falls under the CWE-284 category of Improper Access Control, where the system fails to properly enforce access restrictions. The issue demonstrates a classic case of insufficient input validation that enables privilege escalation through crafted request parameters.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the ability to modify critical configuration namespaces without proper authorization. This capability could lead to severe consequences including configuration tampering that affects application behavior, potential service disruptions, or even complete system compromise if the modified configurations control critical system parameters. The vulnerability affects the integrity and availability of the configuration management system, potentially allowing attackers to inject malicious configurations or disable essential services. Organizations relying on Apollo for configuration management may experience unauthorized changes to their application settings, leading to operational instability and potential security breaches. The attack vector is particularly concerning as it requires minimal privileges to exploit, making it accessible to users who should not have modification capabilities.
The remediation for this vulnerability was implemented through the addition of proper input parameter validation within the synchronization feature. The fix ensures that all incoming requests undergo rigorous validation before any permission checks are bypassed or circumvented. Version 2.3.0 of Apollo includes the necessary security patches that address the specific input validation gaps that enabled the privilege escalation. This update represents a standard security practice of implementing proper input sanitization and validation to prevent unauthorized access patterns. Organizations should immediately upgrade to version 2.3.0 or later to protect against this vulnerability. The fix aligns with security best practices outlined in the OWASP Top Ten and follows the principle of least privilege enforcement. Security teams should also conduct thorough testing of the updated system to ensure that the input validation does not introduce any regressions in the synchronization functionality while maintaining the enhanced security posture. The vulnerability demonstrates the importance of continuous security auditing and the need for robust access control mechanisms in distributed configuration management systems.