CVE-2024-38145 in Windows
Summary
by MITRE • 08/13/2024
Windows Layer-2 Bridge Network Driver Denial of Service Vulnerability
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability resides in the Windows Layer-2 Bridge Network Driver component which operates at the data link layer of the network stack and facilitates communication between virtualized network environments and physical network infrastructure. The flaw manifests as a denial of service condition that can be exploited through malformed network packets or improper handling of specific bridge configurations within the kernel-level driver code. Attackers can leverage this weakness to disrupt network connectivity for systems running affected Windows versions, potentially causing widespread operational disruption in enterprise environments where virtualization and network bridging are commonly deployed.
The technical implementation of this vulnerability stems from inadequate input validation and memory management practices within the kernel-mode network driver responsible for Layer-2 bridging operations. When processing specific network frames or bridge configuration parameters, the driver fails to properly validate incoming data structures which can lead to buffer overflows, null pointer dereferences, or other memory corruption conditions. This type of vulnerability aligns with CWE-125 Out-of-bounds Read and CWE-787 Out-of-bounds Write categories, as the driver code does not adequately enforce bounds checking on network packet data or bridge configuration parameters before processing them in kernel space.
The operational impact of this vulnerability extends beyond simple service disruption to encompass potential system instability and complete network partitioning within virtualized environments. Organizations utilizing Hyper-V virtualization platforms, software-defined networking solutions, or any systems that rely on Layer-2 bridging for network connectivity may experience cascading failures when this vulnerability is exploited. Network administrators could observe intermittent connectivity issues, failed virtual machine migrations, or complete network outages depending on the deployment scenario and exploitation method used by adversaries.
Mitigation strategies should prioritize immediate patch application from Microsoft Security Updates which address the underlying kernel driver flaws through proper input validation and memory management corrections. Organizations should also implement network segmentation controls to limit exposure of critical systems to potentially malicious network traffic, while monitoring for anomalous network behavior that might indicate exploitation attempts. Additionally, system administrators should consider disabling unnecessary Layer-2 bridging features when not actively required, reducing the attack surface available to potential adversaries. From an operational security perspective, implementing network intrusion detection systems with signature-based detection capabilities targeting known exploit patterns can provide early warning of attempted exploitation.
The vulnerability demonstrates characteristics consistent with ATT&CK technique T1499.004 Network Denial of Service which specifically targets network infrastructure to disrupt availability. This particular implementation represents a sophisticated attack vector that leverages the kernel-level nature of the flaw to achieve persistent disruption, potentially allowing attackers to maintain control over affected systems while causing ongoing operational degradation. The use of Layer-2 bridging as an attack surface highlights the importance of securing virtualization environments and network infrastructure components that operate at lower OSI model layers where traditional application-level defenses may prove insufficient.
Security teams should conduct comprehensive vulnerability assessments across all Windows systems that utilize virtualization technologies or network bridging capabilities, particularly focusing on systems running server versions of Windows that are more likely to have Layer-2 bridge functionality enabled. Regular security monitoring should include detection of unusual network traffic patterns and potential exploitation attempts targeting kernel-level network components, ensuring that any compromise can be rapidly identified and contained to prevent broader organizational impact.