CVE-2019-0555 : What You Need to Know
Learn about CVE-2019-0555, an elevation of privilege vulnerability in Microsoft XmlDocument class affecting Windows Server and other versions. Find mitigation steps and prevention measures.
A security weakness, referred to as the "Microsoft XmlDocument Elevation of Privilege Vulnerability," has been discovered in the Microsoft XmlDocument class, potentially allowing attackers to bypass the AppContainer sandbox in the browser. This vulnerability affects various Windows operating systems.
Understanding CVE-2019-0555
This CVE was published on January 8, 2019, by Microsoft.
What is CVE-2019-0555?
CVE-2019-0555 is an elevation of privilege vulnerability in the Microsoft XmlDocument class, enabling attackers to escape the AppContainer sandbox in the browser.
The Impact of CVE-2019-0555
This vulnerability affects multiple Windows operating systems, including Windows Server 2012 R2, Windows RT 8.1, Windows Server 2012, Windows Server 2019, Windows Server 2016, Windows 8.1, Windows 10, and Windows 10 Servers.
Technical Details of CVE-2019-0555
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows attackers to bypass the AppContainer sandbox in the browser by exploiting the Microsoft XmlDocument class.
Affected Systems and Versions
- Windows Server 2012 R2
- Windows RT 8.1
- Windows Server 2012
- Windows Server 2019
- Windows Server 2016
- Windows 8.1
- Windows 10
- Windows 10 Servers
Exploitation Mechanism
Attackers can exploit this vulnerability to elevate their privileges and potentially execute malicious actions on affected systems.
Mitigation and Prevention
Protecting systems from CVE-2019-0555 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Microsoft promptly.
- Implement the principle of least privilege to restrict access rights.
- Monitor and restrict the use of potentially vulnerable applications.
Long-Term Security Practices
- Regularly update and patch all software and operating systems.
- Conduct security training for users to recognize and report suspicious activities.
- Employ network segmentation to contain potential breaches.
Patching and Updates
Regularly check for security updates from Microsoft and apply them to ensure protection against known vulnerabilities.