CVE-2018-1139 : Exploit Details and Defense Strategies
Learn about CVE-2018-1139, a vulnerability in Samba versions before 4.7.9 and 4.8.4 allowing weak NTLMv1 authentication, potentially leading to unauthorized access to sensitive information. Find mitigation steps and preventive measures here.
A vulnerability was discovered in versions of Samba prior to 4.7.9 and 4.8.4, allowing weak NTLMv1 authentication despite being disabled, potentially leading to unauthorized access to sensitive information.
Understanding CVE-2018-1139
This CVE involves a security loophole in Samba versions before 4.7.9 and 4.8.4 that could be exploited by attackers to gain unauthorized access to transmitted credentials.
What is CVE-2018-1139?
CVE-2018-1139 is a vulnerability in Samba versions before 4.7.9 and 4.8.4, enabling the use of weak NTLMv1 authentication even when explicitly disabled.
The Impact of CVE-2018-1139
The vulnerability could allow attackers positioned between the Samba server and client to intercept and access sensitive information transmitted during communication.
Technical Details of CVE-2018-1139
This section provides detailed technical information about the CVE.
Vulnerability Description
A flaw in Samba versions before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication, even when explicitly disabled, potentially exposing credentials to attackers.
Affected Systems and Versions
- Product: Samba
- Vendor: The Samba Team
- Versions Affected: before 4.7.9, before 4.8.4
Exploitation Mechanism
Attackers positioned between the Samba server and client could exploit the vulnerability to gain unauthorized access to credentials and sensitive information transmitted during communication.
Mitigation and Prevention
Protect your systems from CVE-2018-1139 with the following steps:
Immediate Steps to Take
- Update Samba to versions 4.7.9 or 4.8.4 or later to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Implement strong authentication mechanisms and encryption protocols to secure communication channels.
- Regularly audit and review security configurations to identify and address potential vulnerabilities.
Patching and Updates
- Apply security patches provided by Samba to address the vulnerability.