CVE-2024-38101 in Windows
Summary
by MITRE • 07/09/2024
Windows Layer-2 Bridge Network Driver Denial of Service Vulnerability
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Analysis
by VulDB Data Team • 07/12/2024
This vulnerability resides within the Windows layer-2 bridge network driver component that facilitates network virtualization and bridging operations between different network interfaces. The flaw manifests as a denial of service condition that can be triggered through malformed network packets or improper handling of specific bridge configuration parameters during network traffic processing. The underlying technical issue stems from insufficient input validation and memory management within the kernel-mode driver code responsible for layer-2 network bridging functions.
The vulnerability operates at the network protocol stack level where the bridge driver fails to properly validate incoming packet structures or handle edge cases in bridge forwarding logic. Attackers can exploit this weakness by crafting specific network traffic patterns that cause the driver to enter an inconsistent state or consume excessive system resources leading to complete service disruption. This type of vulnerability maps to CWE-129 Input Validation and Output Generation, specifically targeting improper validation of buffer sizes and memory allocation parameters within network driver components. The attack surface is particularly significant in virtualized environments where layer-2 bridging is extensively used for network isolation and traffic forwarding between virtual machines and physical networks.
The operational impact extends beyond simple service interruption to potentially affect entire network infrastructure in environments relying on Windows-based virtualization platforms. When exploited successfully, the vulnerability can cause complete network connectivity loss for affected systems or virtual machines within the bridged network segment. Network administrators may observe sudden drops in network performance, intermittent connectivity issues, or complete network outages across multiple endpoints that depend on the vulnerable bridge driver functionality. The attack can be executed remotely with minimal privileges and requires no user interaction, making it particularly dangerous for enterprise networks where automated network management systems rely on consistent bridge driver behavior.
Mitigation strategies should focus on implementing immediate patch management procedures through Microsoft security updates that address the specific memory handling and input validation flaws in the layer-2 bridge driver. Network segmentation techniques can help isolate vulnerable components from critical infrastructure by implementing separate network zones for bridged traffic. Additionally, monitoring systems should be deployed to detect unusual network behavior patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1499.004 Network Denial of Service which targets network infrastructure reliability through various denial of service mechanisms. System administrators should also consider implementing network access controls and firewall rules to limit exposure of vulnerable bridge driver interfaces to untrusted networks while maintaining operational requirements for legitimate bridging functions.