CVE-2018-1140 : What You Need to Know
Learn about CVE-2018-1140, a flaw in Samba versions 4.8.0 and newer that allows attackers to disrupt servers. Find mitigation steps and long-term security practices here.
A missing input sanitization flaw in the LDP database used for the LDAP server implementation in Samba versions 4.8.0 and newer can lead to a denial of service attack, especially when Samba is utilized as an Active Directory Domain Controller.
Understanding CVE-2018-1140
This CVE involves a vulnerability in Samba that affects its functionality as an Active Directory Domain Controller.
What is CVE-2018-1140?
The flaw in input sanitization within the LDP database used by the LDAP server in Samba versions 4.8.0 and later can be exploited by attackers to disrupt the operation of a Samba server, particularly when functioning as an Active Directory Domain Controller.
The Impact of CVE-2018-1140
The vulnerability poses a medium severity risk with a CVSS base score of 6.5. It can result in a denial of service attack on the Samba server.
Technical Details of CVE-2018-1140
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The flaw lies in the input sanitization process of the LDP database used by the LDAP server in Samba, allowing attackers to disrupt the server's operation.
Affected Systems and Versions
- Product: Samba
- Vendor: The Samba Team
- Versions Affected: 4.8.0 and newer
Exploitation Mechanism
- Attack Vector: ADJACENT_NETWORK
- Attack Complexity: LOW
- Privileges Required: NONE
- User Interaction: NONE
- Scope: UNCHANGED
- Confidentiality Impact: NONE
- Integrity Impact: NONE
- Availability Impact: HIGH
Mitigation and Prevention
To address CVE-2018-1140, follow these mitigation strategies:
Immediate Steps to Take
- Apply vendor-provided patches promptly.
- Monitor vendor resources for updates and security advisories.
- Implement network security best practices.
Long-Term Security Practices
- Regularly update and patch software.
- Conduct security assessments and audits.
- Enhance network security measures.
Patching and Updates
- Regularly check for patches and updates from The Samba Team.
- Apply patches as soon as they are released to mitigate the vulnerability.