CVE-2020-1255 : What You Need to Know
Learn about CVE-2020-1255, an elevation of privilege vulnerability in Windows Background Intelligent Transfer Service (BITS). Find affected systems and how to mitigate this security risk.
An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) IIS module improperly handles uploaded content, aka 'Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability'.
Understanding CVE-2020-1255
CVE-2020-1255 is an elevation of privilege vulnerability that affects various Microsoft Windows products and versions.
What is CVE-2020-1255?
This vulnerability arises due to the improper handling of uploaded content by the Windows Background Intelligent Transfer Service (BITS) IIS module.
The Impact of CVE-2020-1255
The CVE-2020-1255 vulnerability could allow an attacker to elevate privileges on the affected system, potentially leading to unauthorized access and further exploitation.
Technical Details of CVE-2020-1255
CVE-2020-1255 affects multiple versions and editions of Microsoft Windows.
Vulnerability Description
- Vulnerability Type: Elevation of Privilege
Affected Systems and Versions
The following systems and versions are affected:
- Windows 10 Version 2004 for 32-bit Systems
- Windows 10 Version 2004 for ARM64-based Systems
- Windows Server, version 2004 (Server Core installation)
- Windows 10 versions 1803, 1809, 1709, 1607
- Windows 7, 8.1, RT 8.1
- Various Windows Server versions
- Windows 10 Version 1909, 1903
Exploitation Mechanism
The vulnerability can be exploited by uploading malicious content to the BITS IIS module, enabling potential privilege escalation.
Mitigation and Prevention
To address CVE-2020-1255, follow these steps:
Immediate Steps to Take
- Apply the latest security patches from Microsoft
- Monitor system logs for any suspicious activity
- Consider restricting access to vulnerable systems
Long-Term Security Practices
- Implement least privilege principles on the network
- Conduct regular security audits and vulnerability assessments
- Train employees on recognizing and reporting potential security threats
Patching and Updates
Regularly check for and apply security updates provided by Microsoft to protect systems from known vulnerabilities.