In Spring Boot versions 3.0.0 - 3.0.6, 2.7.0 - 2.7.11, 2.6.0 - 2.6.14, 2.5.0 - 2.5.14 and older unsupported versions, there is potential for a denial-of-service (DoS) attack if Spring MVC is used together with a reverse proxy cache. The CVSS score for this vulnerability is 7.5, indicating a high severity level that necessitates immediate attention from organizations utilizing these versions.
The risk to organizations includes potential service disruptions, which can significantly affect business operations and customer trust. Given the availability impact scored as high, this vulnerability poses a serious threat if exploited. Currently, there are no known exploits or public proof of concept available, but the underlying risk remains critical.
Organizations should prioritize patching immediately to ensure their systems are secure against this vulnerability. The urgency for remediation is high, given the potential for significant operational impact.
Vulnerability Details
This vulnerability allows for a denial-of-service condition in Spring Boot when used with a reverse proxy cache. The CVSS score of 7.5 classifies it as high severity, reflecting the potential risk to availability.
The affected products include various versions of Spring Boot, and the vulnerability has been publicly disclosed as of May 26, 2023. The weakness is classified under CWE-400, indicating an improper handling of resource exhaustion.
Technical Analysis
The root cause of this vulnerability lies in the interplay between Spring MVC and reverse proxy caching mechanisms. Attackers may leverage this flaw to exhaust server resources, leading to service unavailability.
The attack vector is network-based, requiring low complexity to exploit, with no privileges or user interaction necessary. The confidentiality and integrity impacts are rated as none, while the availability impact is rated high.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant, as it could lead to major disruptions in service for organizations relying on Spring Boot. The urgency assessment based on the CVSS score indicates that organizations should address this vulnerability in their priority patch cycle.
The blast radius potential is wide, affecting any organization using the specified versions of Spring Boot. Given its high severity and current lack of known exploitation, immediate remediation actions are critical.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Spring Boot include 3.0.0 - 3.0.6, 2.7.0 - 2.7.11, 2.6.0 - 2.6.14, and 2.5.0 - 2.5.14. All versions prior to vendor patch are also affected.
Mitigation & Remediation
Organizations should apply relevant patches and updates to their Spring Boot installations. For those unable to apply the patches immediately, implementing network controls and monitoring can help mitigate the risks associated with this vulnerability.
For further guidance on security testing, organizations may consider engaging in penetration testing to identify and remediate similar weaknesses.
Detection Guidance
Monitoring for unusual traffic patterns, service interruptions, or resource exhaustion can help organizations detect potential exploitation attempts. Logging access to the Spring Boot application and examining reverse proxy configurations can also provide valuable insights.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its demonstration of how architecture decisions can introduce vulnerabilities. Security teams should learn from this incident to ensure that proper caching mechanisms are implemented without exposing systems to DoS attacks.
This incident reflects a broader trend within application vulnerabilities, where misconfigurations and architectural flaws lead to critical security issues. Organizations should take this as a strategic reminder to regularly assess their application security posture.
For more insights on application security best practices, organizations can refer to our resources on penetration testing methodology and vulnerability management program design for ongoing security improvement.
Additionally, the API penetration testing guide can provide further insights into securing applications effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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