CVE-2024-5328 in lunary
Summary
by MITRE • 06/06/2024
A Server-Side Request Forgery (SSRF) vulnerability exists in the lunary-ai/lunary application, specifically within the endpoint '/auth/saml/tto/download-idp-xml'. The vulnerability arises due to the application's failure to validate user-supplied URLs before using them in server-side requests. An attacker can exploit this vulnerability by sending a specially crafted request to the affected endpoint, allowing them to make unauthorized requests to internal or external resources. This could lead to the disclosure of sensitive information, service disruption, or further attacks against the network infrastructure. The issue affects the latest version of the application as of the report.
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Analysis
by VulDB Data Team • 07/24/2024
The CVE-2024-5328 vulnerability represents a critical server-side request forgery flaw in the lunary-ai/lunary application that fundamentally compromises the security boundaries of the affected system. This vulnerability specifically targets the '/auth/saml/tto/download-idp-xml' endpoint, which serves as a legitimate authentication pathway for SAML identity provider configuration. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize or verify user-supplied URLs before processing them within the server context. According to CWE-918, this vulnerability falls under the category of server-side request forgery, where an attacker can manipulate the application to make unintended requests to arbitrary destinations. The vulnerability's impact is particularly severe because it operates at the authentication layer, potentially allowing attackers to bypass normal access controls and gain unauthorized access to internal network resources that would otherwise be protected by firewalls and network segmentation.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious request to the vulnerable endpoint and provides a crafted URL parameter that points to internal resources or external malicious servers. The application, lacking proper validation, processes this URL directly within its server-side request mechanism, effectively acting as a proxy for the attacker's requests. This behavior aligns with the ATT&CK technique T1071.004 for application layer protocol tunneling, where attackers leverage legitimate application functions to establish covert communication channels. The vulnerability enables attackers to perform reconnaissance activities against internal systems, potentially discovering additional targets for exploitation or mapping network topologies. The lack of proper URL validation creates a pathway for attackers to access internal services that should be isolated from external access, including database servers, administrative interfaces, or other sensitive internal resources that are typically protected by network security controls.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential service disruption and broader network compromise scenarios. Attackers can leverage this vulnerability to conduct port scanning activities against internal networks, potentially identifying additional vulnerable systems or services that can be targeted in subsequent phases of attack. The vulnerability also enables attackers to perform malicious requests to external servers, potentially facilitating command and control communications or data exfiltration activities. This represents a significant risk to organizations relying on the lunary application for authentication services, as successful exploitation could allow attackers to establish persistent access to the authentication infrastructure. The vulnerability's presence in the latest version of the application indicates that this represents a critical security gap that requires immediate attention, as it provides attackers with a direct pathway to bypass traditional network security controls and access internal resources that would normally be protected by perimeter defenses.
Organizations should implement immediate mitigations including strict input validation mechanisms that enforce whitelisting of acceptable URL schemes and domains, implementing network segmentation to limit access to internal resources from the vulnerable endpoint, and deploying web application firewalls to monitor and filter malicious requests. The implementation of proper URL validation should follow industry standards such as those outlined in the OWASP Top Ten and the NIST Cybersecurity Framework, specifically addressing the prevention of server-side request forgery through proper input sanitization and validation. Additional defensive measures should include monitoring for unusual patterns of requests to the vulnerable endpoint, implementing rate limiting to prevent automated exploitation attempts, and conducting regular security assessments to identify similar vulnerabilities in other application components. Organizations should also consider implementing a principle of least privilege for the affected endpoint, restricting access to only authorized users and systems to minimize the potential impact of successful exploitation attempts. The vulnerability highlights the importance of comprehensive security testing, particularly in authentication and authorization components, to prevent similar flaws from being introduced in future application versions.