CVE-2019-14907 : Vulnerability Insights and Analysis
Learn about CVE-2019-14907, a vulnerability in Samba affecting versions 4.9.x, 4.10.x, and 4.11.x. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
CVE-2019-14907 is a vulnerability found in various versions of Samba, specifically affecting versions 4.9.x before 4.9.18, 4.10.x before 4.10.12, and 4.11.x before 4.11.5. This issue arises when the "log level" configuration is set to a value of 3 or higher, leading to potential termination of long-running processes within the Samba Active Directory Domain Controller.
Understanding CVE-2019-14907
What is CVE-2019-14907?
CVE-2019-14907 is a vulnerability in Samba that can cause the termination of critical processes within the Samba Active Directory Domain Controller.
The Impact of CVE-2019-14907
The vulnerability can result in the crash of long-running processes, such as the RPC server, within the Samba AD DC.
Technical Details of CVE-2019-14907
Vulnerability Description
The issue occurs when the "log level" configuration is set to 3 or higher, leading to a problem during the NTLMSSP authentication exchange.
Affected Systems and Versions
- Red Hat Samba versions 4.11.x before 4.11.5
- Red Hat Samba versions 4.10.x before 4.10.12
- Red Hat Samba versions 4.9.x before 4.9.18
Exploitation Mechanism
The problem arises when a client encounters a failed character conversion during the NTLMSSP authentication exchange.
Mitigation and Prevention
Immediate Steps to Take
- Update Samba to versions 4.11.5, 4.10.12, or 4.9.18 to mitigate the vulnerability.
- Monitor for any unusual activity on the Samba AD DC.
Long-Term Security Practices
- Regularly update Samba and other software to the latest versions.
- Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
Apply the latest patches and updates provided by Red Hat to address CVE-2019-14907.