CVE-2020-10700 : What You Need to Know

A use-after-free vulnerability in Samba AD DC LDAP servers could allow a malicious user to trigger a denial of service attack on systems running versions before 4.10.15, 4.11.8, and 4.12.2.

Understanding CVE-2020-10700

This CVE involves a critical use-after-free flaw in Samba, impacting various versions before specific updates.

What is CVE-2020-10700?

CVE-2020-10700 is a vulnerability in Samba AD DC LDAP servers that could be exploited by an attacker to cause a denial of service on affected systems.

The Impact of CVE-2020-10700

The vulnerability poses a medium severity risk with a CVSS base score of 5.3. It requires network access and user interaction to exploit, potentially leading to high availability impact.

Technical Details of CVE-2020-10700

This section delves into the technical aspects of the CVE.

Vulnerability Description

The use-after-free flaw in Samba AD DC LDAP servers occurs when handling 'Paged Results' control combined with the 'ASQ' control, allowing a malicious user to disrupt services.

Affected Systems and Versions

All versions before 4.10.15
All versions before 4.11.8
All versions before 4.12.2

Exploitation Mechanism

The vulnerability can be exploited by a malicious user in a Samba AD environment to trigger a denial of service attack.

Mitigation and Prevention

Protecting systems from CVE-2020-10700 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply the necessary security updates provided by Red Hat for Samba versions 4.10.15, 4.11.8, and 4.12.2.
Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update and patch software to mitigate potential vulnerabilities.
Implement network segmentation and access controls to limit the impact of security breaches.

Patching and Updates

Red Hat has released patches to address the CVE-2020-10700 vulnerability in affected Samba versions.