CVE-2025-9784 identifies a vulnerability in the Undertow web server component used within the Red Hat build of Apache Camel for Spring Boot 4. The flaw arises from improper handling of malformed client requests that trigger server-side stream resets repeatedly without incrementing abuse counters. This behavior allows malicious clients to induce excessive server workload by causing continuous server-side stream aborts, a condition dubbed the "MadeYouReset" attack. Unlike protocol-level bugs, this vulnerability stems from an implementation weakness where resource allocation is not properly limited or throttled during stream resets. The attack vector is network-based, requiring no authentication or user interaction, making it accessible to remote attackers. The consequence is a denial of service (DoS) due to resource exhaustion, impacting server availability. The CVSS v3.1 score of 7.5 reflects high severity, emphasizing the vulnerability's potential to disrupt services. While no patches are currently linked, organizations should anticipate updates from Red Hat. The vulnerability is categorized under CWE-404, indicating allocation of resources without limits or throttling, a common cause of DoS conditions. This issue highlights the need for robust resource management in server implementations to prevent exploitation through malformed requests.

The primary impact of CVE-2025-9784 is denial of service (DoS) caused by resource exhaustion on servers running the affected Undertow component within Red Hat's Apache Camel for Spring Boot 4. For European organizations, this could lead to significant service disruptions, especially for enterprises relying on these technologies for critical business applications, middleware, or integration platforms. The attack does not compromise confidentiality or integrity but severely affects availability, potentially leading to downtime, loss of productivity, and reputational damage. Industries such as finance, telecommunications, and government services that depend on high availability and robust middleware solutions are particularly vulnerable. Additionally, the lack of abuse counter increments means traditional detection mechanisms may fail to identify ongoing attacks promptly, increasing the risk of prolonged outages. The remote and unauthenticated nature of the exploit broadens the attack surface, making it easier for threat actors to target European organizations without insider access. This vulnerability could also be leveraged as part of larger multi-vector attacks aiming to disrupt supply chains or critical infrastructure.

To mitigate CVE-2025-9784, organizations should implement several targeted measures beyond generic advice: 1) Monitor server logs and network traffic for unusual patterns of stream resets or aborted connections that do not correlate with legitimate client behavior. 2) Deploy rate limiting and connection throttling at the network perimeter or load balancers to restrict the frequency of client requests that can trigger stream resets. 3) Configure Undertow and Apache Camel components to enforce stricter resource allocation limits and timeouts where possible, reducing the impact of repeated stream aborts. 4) Engage with Red Hat and monitor their security advisories closely to apply patches or updates as soon as they become available. 5) Conduct regular stress testing and resilience assessments simulating malformed request scenarios to evaluate system robustness. 6) Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block malformed requests targeting this vulnerability. 7) Segment critical middleware infrastructure to limit the blast radius of potential DoS attacks. These steps will help reduce the likelihood and impact of exploitation until official patches are released.