Microsoft has recently addressed a zero-day vulnerability and two security flaws that compromise Secure Boot functionality. These vulnerabilities could potentially allow attackers to bypass Secure Boot protections and execute malicious code on affected systems.
Secure Boot is a security feature in modern computers that ensures that only trusted software is loaded during the boot process. It is designed to prevent malware from infecting the boot process and compromising the system’s security. However, the recent vulnerabilities discovered by Microsoft could potentially allow attackers to bypass these protections and execute malicious code during the boot process.
The first vulnerability, known as CVE-2021-40444, is a zero-day vulnerability in Microsoft Office that allows attackers to execute arbitrary code on affected systems. The vulnerability is caused by a flaw in the MSHTML component of Microsoft Office, which is used to render web content in Office documents. Attackers can exploit this vulnerability by tricking users into opening a specially crafted Office document that contains malicious code.
Microsoft has released a security update to address this vulnerability, and users are advised to install the update as soon as possible to protect their systems from potential attacks.
The second vulnerability, known as CVE-2021-36934, is a security flaw in the Windows operating system that allows attackers to access sensitive data on affected systems. The vulnerability is caused by a flaw in the Windows Volume Shadow Copy Service (VSS), which is used to create backups of files and folders on Windows systems.
Attackers can exploit this vulnerability by gaining access to an affected system and using a special tool to extract sensitive data from the VSS. Microsoft has released a security update to address this vulnerability, and users are advised to install the update as soon as possible to protect their systems from potential attacks.
The third vulnerability, known as CVE-2021-34481, is a security flaw in the Secure Boot feature of Windows that allows attackers to bypass Secure Boot protections and execute malicious code on affected systems. The vulnerability is caused by a flaw in the Windows Boot Manager, which is used to load the operating system during the boot process.
Attackers can exploit this vulnerability by gaining access to an affected system and replacing the Windows Boot Manager with a malicious version that bypasses Secure Boot protections. Microsoft has released a security update to address this vulnerability, and users are advised to install the update as soon as possible to protect their systems from potential attacks.
In conclusion, the recent vulnerabilities discovered by Microsoft highlight the importance of keeping your systems up-to-date with the latest security updates and patches. Users are advised to install the latest security updates from Microsoft as soon as possible to protect their systems from potential attacks. Additionally, users should be cautious when opening Office documents or downloading files from untrusted sources to avoid falling victim to these types of attacks.
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- Source: Plato Data Intelligence: PlatoData