CVE-2024-30105 is a vulnerability identified in Microsoft .NET 8.0, classified under CWE-400: Uncontrolled Resource Consumption. This flaw allows an attacker to cause a denial of service (DoS) condition by exploiting the way .NET 8.0 handles resource allocation, leading to exhaustion of system resources such as memory or CPU cycles. The vulnerability does not affect confidentiality or integrity but severely impacts availability by potentially crashing or severely degrading the performance of applications built on .NET 8.0. The CVSS 3.1 base score is 7.5, reflecting a high severity due to its network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), meaning the impact is limited to the vulnerable component. No known exploits have been reported in the wild yet, but the vulnerability is publicly disclosed and can be leveraged remotely without authentication. This makes it a significant risk for any environment running .NET 8.0, especially those exposed to untrusted networks. The lack of an official patch at the time of disclosure necessitates immediate attention to monitoring and mitigation strategies to prevent exploitation.

For European organizations, the primary impact of CVE-2024-30105 is the potential for denial of service attacks that can disrupt critical business applications and services built on .NET 8.0. This can lead to operational downtime, loss of productivity, and potential financial losses. Sectors such as finance, healthcare, government, and manufacturing that rely heavily on Microsoft technologies and .NET frameworks are particularly vulnerable. The disruption of services could also affect customer trust and regulatory compliance, especially under regulations like GDPR where service availability is a component of data protection obligations. Since the vulnerability does not compromise data confidentiality or integrity, the risk is focused on availability and service continuity. Organizations with internet-facing .NET 8.0 applications or APIs are at higher risk of remote exploitation. The absence of known exploits currently provides a window for proactive defense, but the ease of exploitation and network accessibility mean attackers could develop exploits rapidly.

1. Monitor official Microsoft channels closely for patches or updates addressing CVE-2024-30105 and apply them immediately upon release. 2. Implement network-level protections such as Web Application Firewalls (WAFs) and Intrusion Prevention Systems (IPS) to detect and block anomalous traffic patterns indicative of resource exhaustion attacks. 3. Employ rate limiting and throttling on exposed .NET 8.0 services to reduce the risk of resource exhaustion from high-volume requests. 4. Conduct thorough resource usage monitoring and alerting on critical .NET applications to detect unusual spikes in CPU or memory consumption early. 5. Isolate critical .NET 8.0 applications behind VPNs or restrict access to trusted networks where feasible to reduce exposure. 6. Review and harden application code to handle resource allocation more efficiently and implement graceful degradation strategies. 7. Prepare incident response plans specifically for denial of service scenarios to minimize downtime and recovery time. 8. Consider temporary downgrade to earlier, unaffected .NET versions if patching is delayed and risk is unacceptable.