The vulnerability CVE-2024-4027 affects Undertow, a web server component used in Red Hat OpenShift Serverless. It arises from improper input validation when servlets invoke HttpServletRequestImpl.getParameterNames(). Specifically, if a client sends a request containing very large parameter names, the server may run out of memory, causing an OutOfMemoryError and resulting in a denial-of-service condition. The flaw can be exploited remotely without authentication. Red Hat has rated this issue as having an important impact due to the potential for remote DoS attacks. No mitigation is currently available, and users are advised to apply updates when they become available. The CVSS v3.1 base score is 7.5 (high severity) with network attack vector, low complexity, no privileges or user interaction required, and an impact limited to availability.

An attacker can remotely cause a denial-of-service (DoS) condition by sending specially crafted requests with large parameter names, leading to an OutOfMemoryError in the server process. This results in resource exhaustion and service disruption. There is no impact on confidentiality or integrity according to the vendor advisory. The vulnerability does not require authentication or user interaction to exploit.

Currently, there is no mitigation available for this vulnerability. Red Hat recommends monitoring the vendor advisory for updates and applying patches as soon as they are released. No temporary workarounds or mitigations are provided by Red Hat at this time.