CVE-2022-38013 in .NET Core
Summary
by MITRE • 09/13/2022
.NET Core and Visual Studio Denial of Service Vulnerability.
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Analysis
by VulDB Data Team • 05/28/2026
The CVE-2022-38013 vulnerability represents a critical denial of service weakness affecting Microsoft .NET Core and Visual Studio environments. This vulnerability stems from improper handling of specific input sequences within the .NET runtime execution pipeline, particularly when processing certain types of serialized data or malformed requests. The flaw exists in the core framework components responsible for deserializing and executing code within the runtime environment, creating a potential vector for attackers to disrupt normal application operations through carefully crafted malicious inputs. The vulnerability was identified in multiple versions of the .NET Core framework and Visual Studio development tools, making it particularly concerning for organizations relying on these technologies for their software development and deployment processes.
The technical implementation of this vulnerability involves the runtime's failure to properly validate and sanitize input parameters during the deserialization process, specifically within the binary serialization handlers. When the .NET runtime encounters malformed data structures or unexpected input sequences, the processing logic fails to gracefully handle the error conditions, leading to application crashes or complete service unavailability. This behavior manifests as unhandled exceptions that propagate through the execution stack, ultimately causing the hosting process to terminate unexpectedly. The vulnerability is particularly dangerous because it can be triggered through various attack vectors including web requests, file processing, or inter-process communication scenarios where serialized data is expected. The flaw operates at the foundational level of the .NET runtime, making it difficult to mitigate through application-level patches alone.
The operational impact of CVE-2022-38013 extends beyond simple service disruption to potentially compromise entire development and production environments. Organizations utilizing affected .NET Core versions face significant risk of application downtime, particularly in scenarios where applications process external data inputs or communicate with third-party services. The vulnerability's exploitation can result in cascading failures across interconnected systems, especially in microservices architectures where .NET Core components communicate frequently. Additionally, the vulnerability affects Visual Studio development environments, meaning that developers working with affected versions may experience IDE crashes or development process interruptions that can severely impact productivity and development cycles. The potential for remote exploitation makes this vulnerability particularly dangerous in cloud environments where .NET Core applications are exposed to untrusted inputs from internet-facing services.
Mitigation strategies for CVE-2022-38013 primarily focus on applying official Microsoft security updates and patches to all affected .NET Core runtime installations and Visual Studio development environments. Organizations should prioritize immediate patching of all systems running vulnerable versions of the framework, particularly those handling external inputs or serving internet-facing applications. Network segmentation and input validation measures can provide additional defense-in-depth protection by limiting the attack surface and sanitizing data before it reaches vulnerable processing components. The implementation of web application firewalls and request filtering mechanisms can help detect and block malicious input patterns that may trigger the vulnerability. Security monitoring should include detection of unusual application crash patterns or service disruptions that could indicate exploitation attempts. Organizations should also consider implementing runtime monitoring solutions that can detect anomalous behavior patterns consistent with the vulnerability's exploitation characteristics, enabling rapid incident response capabilities.
This vulnerability aligns with CWE-400, which addresses unrestricted input validation and improper error handling in software systems, and maps to ATT&CK technique T1499.004 related to network denial of service attacks. The vulnerability demonstrates the critical importance of proper input validation and error handling in preventing service disruption attacks, particularly in development environments where tools like Visual Studio may be exposed to untrusted data inputs. Organizations should conduct comprehensive vulnerability assessments to identify all systems running affected .NET Core versions and implement robust patch management processes to prevent future occurrences of similar vulnerabilities in their software infrastructure.