CVE-2024-38821 is a critical vulnerability with a CVSS score of 9.1 that affects Spring WebFlux applications. This vulnerability allows unauthorized access to static resources if specific conditions are met. Organizations using Spring's static resources support in WebFlux applications and applying non-permitAll authorization rules are at risk. The exploitation of this vulnerability can lead to significant security breaches, and organizations must prioritize patching immediately.
The urgency for defenders is heightened due to the critical nature of this vulnerability, coupled with confirmed exploit availability. If left unaddressed, attackers may leverage this vulnerability to access sensitive information, thereby posing a severe risk to organizational integrity and confidentiality.
Organizations should be aware that for this vulnerability to impact an application, all of the following must be true: it must be a WebFlux application, it must utilize Spring's static resources support, and it must have a non-permitAll authorization rule in place.
Given the critical severity and the potential for exploitation, organizations using vulnerable versions of Spring WebFlux should take immediate action to mitigate risks associated with CVE-2024-38821.
Vulnerability Details
CVE-2024-38821 describes a critical issue in Spring WebFlux applications allowing for authorization bypass of static resources. The vulnerability is classified under CWE-770. The CVSS vector indicates a low attack complexity and that no privileges or user interaction are required for exploitation, with a high impact on confidentiality and integrity.
Technical Analysis
The root cause of this vulnerability lies in improper handling of authorization rules within Spring WebFlux applications. Specifically, applications may allow access to static resources without appropriate authorization checks, leading to unauthorized access.
The attack vector is network-based, and the attack complexity is low. No privileges are required, and there is no user interaction necessary to exploit this vulnerability. The potential impact on confidentiality and integrity is high, while availability remains unaffected.
Risk & Impact Analysis
Risk to organizations includes unauthorized access to sensitive static resources, which could lead to data breaches and compromised integrity of the application. The blast radius is significant, particularly for organizations that rely heavily on Spring WebFlux for web applications. Given the high EPS score percentile (94.03%), the urgency for remediation is critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Spring WebFlux that support static resource authorization are affected by CVE-2024-38821. Organizations should consult vendor patches to determine specific affected versions.
Mitigation & Remediation
Organizations should implement the following mitigations to address CVE-2024-38821: apply the latest patches provided by the vendor for Spring WebFlux, review and adjust authorization rules for static resources, and consider implementing additional security measures such as network controls. For continuous security improvements, organizations may want to engage in continuous security testing to validate security postures.
Detection Guidance
To detect exploitation attempts of CVE-2024-38821, organizations should monitor logs for unusual access patterns to static resources and review authorization failures. Behavioral anomalies within application logs may also indicate attempts to bypass security controls.
AppSecure Threat Intelligence Insight
CVE-2024-38821 represents a significant risk for Spring WebFlux applications, highlighting the importance of robust authorization practices. Security teams should take this opportunity to review their security policies and consider adopting best practices for application security. Engaging in a comprehensive penetration testing methodology can also provide insights into potential weaknesses. Furthermore, organizations should consider establishing a vulnerability management program to proactively address security issues.
Additionally, leveraging resources such as API penetration testing can help identify weaknesses in web applications leveraging Spring WebFlux.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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