CVE-2017-8495 : What You Need to Know
Learn about CVE-2017-8495, a critical security flaw in Microsoft Windows systems allowing attackers to bypass Extended Protection for Authentication by manipulating the SNAME field in Kerberos.
A security vulnerability known as "Kerberos SNAME Security Feature Bypass Vulnerability" or Orpheus' Lyre affects various Microsoft Windows versions, allowing attackers to bypass Extended Protection for Authentication.
Understanding CVE-2017-8495
This CVE identifies a critical security flaw in Microsoft Windows systems that enables attackers to manipulate the SNAME field during Kerberos ticket exchange.
What is CVE-2017-8495?
The vulnerability in Microsoft Windows systems permits threat actors to bypass Extended Protection for Authentication by tampering with the SNAME field during Kerberos ticket exchange.
The Impact of CVE-2017-8495
The exploitation of this vulnerability can lead to unauthorized access and potential security breaches on affected Windows systems.
Technical Details of CVE-2017-8495
This section delves into the specifics of the vulnerability affecting Microsoft Windows systems.
Vulnerability Description
The flaw allows attackers to bypass Extended Protection for Authentication by manipulating the SNAME field during Kerberos ticket exchange.
Affected Systems and Versions
- Microsoft Windows 7 SP1
- Windows Server 2008 SP2 and R2 SP1
- Windows 8.1 and Windows RT 8.1
- Windows Server 2012 and R2
- Windows 10 Gold, 1511, 1607, and 1703
- Windows Server 2016
Exploitation Mechanism
Attackers exploit the vulnerability by tampering with the SNAME field during Kerberos ticket exchange, enabling them to bypass Extended Protection for Authentication.
Mitigation and Prevention
Protecting systems from CVE-2017-8495 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by Microsoft promptly.
- Monitor network traffic for any suspicious activities.
- Implement strong authentication mechanisms.
Long-Term Security Practices
- Regularly update and patch all Windows systems.
- Conduct security training for employees to recognize social engineering attacks.
- Employ network segmentation to limit the impact of potential breaches.
Patching and Updates
Regularly check for security updates and patches released by Microsoft to address the CVE-2017-8495 vulnerability.