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CVE-2024-21351 Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
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CVE-2024-21351 Description
CVE-2024-21351 is a high-severity Windows SmartScreen security feature bypass vulnerability. It allows attackers to evade detection by manipulating the Mark of the Web (MOTW) mechanism that flags files downloaded from the internet. The vulnerability requires user interaction to be exploited, as an attacker must convince the user to open a malicious file. The impact includes a low risk to confidentiality, a high risk to integrity (allowing unauthorized modifications), and a low risk to availability. An official fix is available, emphasizing the importance of applying security updates promptly.
What is Affected By CVE-2024-21351
Affected by CVE-2024-21351 are multiple Windows versions and configurations, including Windows Server 2016, Windows 10 (various versions for x64-based, 32-bit, and ARM64-based systems), and Windows 11 (versions 22H2 and 23H2 for x64-based and ARM64-based systems), as well as Windows Server 2022 and 2019. The vulnerability impacts systems by allowing security feature bypass, with updates provided to mitigate the issue across these diverse platforms.
Mitigation and Remediation For CVE-2024-21351
To mitigate and remediate CVE-2024-21351, users should apply the official fix provided by Microsoft. This typically involves updating the affected software to the latest version where the vulnerability has been addressed. Ensuring that Windows updates are regularly installed is crucial for protecting against such vulnerabilities. For specific instructions and updates, refer to the Microsoft Security Update Guide or the advisory related to CVE-2024-21351. It’s essential to follow these recommendations promptly to reduce the risk of exploitation.
Impact of Successful Exploitation of CVE-2024-21351
The successful exploitation of CVE-2024-21351 could allow attackers to bypass the Windows SmartScreen feature, leading to unauthorized modifications of data (high impact on integrity), potential exposure of sensitive information (low impact on confidentiality), and minimal disruption to system availability (low impact on availability). This breach could undermine the security mechanisms designed to protect users from executing harmful software, emphasizing the importance of timely mitigation and remediation efforts.
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