CVE-2017-8691 Explained : Impact and Mitigation
Learn about CVE-2017-8691, a critical vulnerability in Windows Kernel-Mode Drivers allowing remote code execution on Windows Server 2008 SP2, R2 SP1, and Windows 7 SP1 systems. Take immediate steps to apply security patches and enhance long-term security practices.
A vulnerability named "Express Compressed Fonts Remote Code Execution Vulnerability" affects Windows Server 2008 SP2 and R2 SP1, as well as Windows 7 SP1, allowing remote code execution.
Understanding CVE-2017-8691
This CVE involves a critical vulnerability in Windows Kernel-Mode Drivers that enables attackers to execute code remotely on targeted systems.
What is CVE-2017-8691?
The vulnerability allows malicious actors to exploit the Windows font library's inability to handle specifically designed embedded fonts, leading to remote code execution on affected systems.
The Impact of CVE-2017-8691
- Attackers can remotely execute code on Windows Server 2008 SP2 and R2 SP1, and Windows 7 SP1 systems.
Technical Details of CVE-2017-8691
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in Windows Kernel-Mode Drivers permits remote code execution by leveraging the font library's inability to handle certain embedded fonts correctly.
Affected Systems and Versions
- Product: Windows Kernel-Mode Drivers
- Vendor: Microsoft Corporation
- Versions Affected: Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1
Exploitation Mechanism
The exploit involves crafting specially designed embedded fonts to trigger remote code execution on vulnerable systems.
Mitigation and Prevention
Protecting systems from CVE-2017-8691 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Microsoft promptly.
- Implement network segmentation to limit the attack surface.
- Monitor network traffic for any suspicious activities.
Long-Term Security Practices
- Regularly update and patch all software and operating systems.
- Conduct security training for employees to recognize and report potential threats.
- Employ intrusion detection and prevention systems to enhance network security.
- Consider implementing application whitelisting to control executable files.
Patching and Updates
Regularly check for security updates and patches from Microsoft to address vulnerabilities and enhance system security.