CVE-2018-16857 : Vulnerability Insights and Analysis
Learn about CVE-2018-16857 affecting Samba versions 4.9.0 to 4.9.3. Understand the high severity impact on AD DC configurations and how to mitigate this vulnerability.
CVE-2018-16857 was published on November 28, 2018, affecting Samba versions 4.9.0 to 4.9.3. This vulnerability impacts the monitoring of bad passwords in AD DC configurations, potentially leading to security issues.
Understanding CVE-2018-16857
This CVE highlights a specific vulnerability in Samba versions 4.9.0 to 4.9.3 that affects the monitoring of bad passwords in Active Directory Domain Controller (AD DC) configurations.
What is CVE-2018-16857?
Samba versions 4.9.0 to 4.9.3 may fail to properly monitor bad passwords in AD DC configurations, especially in domains upgraded from Samba 4.8 or earlier versions. This oversight could impact password policy enforcement.
The Impact of CVE-2018-16857
The vulnerability poses a high severity risk with a CVSS base score of 7.4. The confidentiality, integrity, and availability of affected systems are at high risk, with a complex attack vector over the network.
Technical Details of CVE-2018-16857
This section delves into the specific technical aspects of the CVE.
Vulnerability Description
The issue arises when AD DC configurations fail to monitor bad passwords for more than a 3-minute period, potentially allowing brute-force attacks to go undetected.
Affected Systems and Versions
- Product: Samba
- Vendor: [UNKNOWN]
- Versions: 4.9.0 to 4.9.3
Exploitation Mechanism
The vulnerability can be exploited remotely without requiring privileges, making it a critical security concern for affected systems.
Mitigation and Prevention
To address CVE-2018-16857, immediate actions and long-term security practices are essential.
Immediate Steps to Take
- Update Samba to a patched version immediately.
- Monitor password policies and conduct thorough testing post-upgrade.
Long-Term Security Practices
- Regularly review and update security configurations.
- Implement network segmentation to limit the impact of potential breaches.
Patching and Updates
Regularly check for security advisories and apply patches promptly to mitigate the risk of exploitation.