CVE-2017-11786 Explained : Impact and Mitigation
Learn about CVE-2017-11786, a Skype for Business vulnerability allowing unauthorized access by extracting authentication hashes. Find mitigation steps and prevention measures here.
A vulnerability known as "Skype for Business Elevation of Privilege Vulnerability" in Microsoft Lync 2013 SP1 and Skype for Business 2016 allows unauthorized access by extracting an authentication hash.
Understanding CVE-2017-11786
This CVE involves an elevation of privilege vulnerability in Skype for Business, potentially leading to unauthorized access.
What is CVE-2017-11786?
The vulnerability enables an attacker to extract an authentication hash from an authentication request in Microsoft Lync 2013 SP1 and Skype for Business 2016, which can then be misused for unauthorized access.
The Impact of CVE-2017-11786
The exploitation of this vulnerability could result in unauthorized individuals gaining access to sensitive information or systems, posing a significant security risk.
Technical Details of CVE-2017-11786
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The flaw allows attackers to steal authentication hashes from Skype for Business, facilitating unauthorized access to other locations.
Affected Systems and Versions
- Product: Skype for Business
- Vendor: Microsoft Corporation
- Versions Affected: Microsoft Lync 2013 SP1 and Skype for Business 2016
Exploitation Mechanism
Attackers can exploit the vulnerability by extracting authentication hashes from authentication requests, enabling them to gain unauthorized access.
Mitigation and Prevention
Protecting systems from this vulnerability 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
- Conduct regular security audits and assessments.
- Educate users on secure authentication practices.
- Keep systems and software updated to prevent vulnerabilities.
- 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-2017-11786 vulnerability.