CVE-2025-9784 is a vulnerability identified in the Red Hat build of Apache Camel for Spring Boot 4, stemming from a weakness in Undertow's server implementation. Specifically, malformed client requests can cause server-side stream resets repeatedly without triggering the server's abuse detection counters. This flaw, dubbed the "MadeYouReset" attack, exploits the lack of limits or throttling on resource allocation during stream resets, allowing malicious clients to induce excessive workload on the server. While this is not a protocol-level bug, it exposes a common implementation weakness where the server fails to properly manage resource exhaustion scenarios. The vulnerability falls under CWE-404 (Improper Resource Shutdown or Release), indicating that resources are not adequately controlled or released under attack conditions. The CVSS v3.1 base score is 7.5, reflecting a high severity due to the network attack vector, no required privileges or user interaction, and a significant impact on availability. The vulnerability can lead to denial of service by overwhelming the server with aborted streams, potentially causing service outages or degraded performance. No patches or exploit code are currently publicly available, but the risk remains high given the ease of exploitation and the critical role of Apache Camel in enterprise integration and Spring Boot applications.

For European organizations, the primary impact of CVE-2025-9784 is a denial of service condition that can disrupt critical business applications relying on Apache Camel for Spring Boot 4. This can affect service availability, leading to downtime, loss of productivity, and potential financial losses. Sectors such as finance, telecommunications, manufacturing, and public services that use Red Hat and Spring Boot extensively may face operational disruptions. The vulnerability does not compromise data confidentiality or integrity but can indirectly affect business continuity and customer trust. Additionally, prolonged or repeated exploitation could strain IT resources and increase incident response costs. Given the widespread use of Red Hat products and Spring Boot in Europe, the threat landscape includes both private enterprises and government infrastructure, making the impact potentially broad and significant.

To mitigate CVE-2025-9784, organizations should implement specific controls beyond generic patching advice. First, apply any available updates or patches from Red Hat as soon as they are released. In the absence of patches, configure Undertow and Apache Camel to enforce strict rate limiting and throttling on incoming client requests, especially those that trigger stream resets. Implement enhanced monitoring and logging to detect unusual patterns of aborted streams or excessive resource consumption. Employ network-level protections such as Web Application Firewalls (WAFs) to filter malformed requests and block suspicious traffic. Consider deploying anomaly detection systems that can alert on abnormal server workload spikes. Additionally, review and harden server resource allocation policies to prevent exhaustion under attack conditions. Engage with Red Hat support for guidance on temporary workarounds and best practices tailored to your deployment environment. Finally, conduct regular security assessments and stress testing to evaluate resilience against such resource exhaustion attacks.