CVE-2019-3824 : Exploit Details and Defense Strategies

Samba before version 4.10 had a vulnerability that could be exploited by an authenticated user with read permissions on the LDAP server, leading to a denial of service.

Understanding CVE-2019-3824

This CVE involves a flaw in the LDAP search expression that could crash the shared LDAP server process of a Samba AD DC.

What is CVE-2019-3824?

Prior to version 4.10, Samba had a vulnerability where an authenticated user with read permissions on the LDAP server could exploit a flaw in the LDAP search expression, resulting in a denial of service. This flaw could cause the shared LDAP server process of a Samba AD DC to crash.

The Impact of CVE-2019-3824

The vulnerability could allow an attacker to crash the shared LDAP server process of a Samba AD DC, leading to a denial of service.

Technical Details of CVE-2019-3824

This section provides more technical insights into the CVE.

Vulnerability Description

A flaw in the LDAP search expression could crash the shared LDAP server process of a Samba AD DC in versions before 4.10. An authenticated user with read permissions on the LDAP server could exploit this flaw to cause a denial of service.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions affected: N/A

Exploitation Mechanism

An authenticated user with read permissions on the LDAP server could exploit the flaw in the LDAP search expression to crash the shared LDAP server process of a Samba AD DC.

Mitigation and Prevention

Protecting systems from CVE-2019-3824 is crucial to maintaining security.

Immediate Steps to Take

Upgrade Samba to version 4.10 or newer to mitigate the vulnerability.
Restrict access to the LDAP server to authorized users only.

Long-Term Security Practices

Regularly monitor and update software to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply security updates provided by Samba to address the vulnerability.