CVE-2019-0975 : What You Need to Know
Learn about CVE-2019-0975, a security feature bypass vulnerability in Active Directory Federation Services (ADFS) allowing unauthorized access. Find out affected systems and mitigation steps.
A security feature bypass vulnerability in Active Directory Federation Services (ADFS) allows attackers to manipulate the list of banned IP addresses, potentially compromising security.
Understanding CVE-2019-0975
What is CVE-2019-0975?
This vulnerability in ADFS enables attackers to bypass security measures by convincing an ADFS administrator to update the list of banned IP addresses.
The Impact of CVE-2019-0975
This vulnerability poses a risk of unauthorized access and potential security breaches within affected systems.
Technical Details of CVE-2019-0975
Vulnerability Description
The vulnerability arises from ADFS failing to update the list of banned IP addresses correctly, leading to a security feature bypass.
Affected Systems and Versions
- Windows Server 2016
- Windows Server 2016 (Core installation)
- Windows Server version 1803 (Core Installation)
- Windows Server 2019
- Windows Server 2019 (Core installation)
- Windows Server, version 1903 (Server Core installation) - unspecified
Exploitation Mechanism
To exploit this vulnerability, an attacker must manipulate the list of banned IP addresses by deceiving an ADFS administrator.
Mitigation and Prevention
Immediate Steps to Take
- Apply the security update provided by Microsoft to address this vulnerability.
- Monitor and restrict access to ADFS administrative functions.
Long-Term Security Practices
- Regularly update and patch ADFS and related systems.
- Educate administrators on security best practices to prevent social engineering attacks.
Patching and Updates
Ensure timely installation of security patches and updates to mitigate the risk of exploitation.