CVE-2019-3880 : What You Need to Know
Discover the impact of CVE-2019-3880 on Samba software. Learn about the vulnerability allowing attackers to create new registry hive files and how to mitigate the risk effectively.
Samba software versions before 4.8.11, 4.9.6, and 4.10.2 are vulnerable to a flaw in the RPC endpoint implementation mimicking the Windows registry service API.
Understanding CVE-2019-3880
This CVE affects Samba software, allowing unprivileged attackers to create new registry hive files.
What is CVE-2019-3880?
The vulnerability in Samba's RPC endpoint allows attackers without special privileges to generate new registry hive files in locations where they have Unix permissions, potentially creating files in the Samba share.
The Impact of CVE-2019-3880
- CVSS Base Score: 4.2 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: Low
- Integrity Impact: Low
- Availability Impact: Low
Technical Details of CVE-2019-3880
Samba's vulnerability details and affected systems.
Vulnerability Description
The flaw in Samba's RPC endpoint allows unprivileged attackers to create new registry hive files, impacting system security.
Affected Systems and Versions
- Affected Versions: Samba 4.8.11, 4.9.6, 4.10.2
- Vendor: The Samba Project
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging the flawed RPC endpoint to create new registry hive files in Samba shares.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2019-3880.
Immediate Steps to Take
- Update Samba software to versions 4.8.11, 4.9.6, or 4.10.2 to patch the vulnerability.
- Monitor system logs for any suspicious activity related to registry hive file creation.
Long-Term Security Practices
- Regularly update Samba software and apply security patches promptly.
- Implement access controls and permissions to restrict unauthorized file creation.
Patching and Updates
- Apply the latest patches and updates provided by The Samba Project to address CVE-2019-3880.