CVE-2020-8816 Explained : Impact and Mitigation

Pi-hole Web v4.3.2 (aka AdminLTE) allows Remote Code Execution by privileged dashboard users via a crafted DHCP static lease.

Understanding CVE-2020-8816

Pi-hole Web v4.3.2 is vulnerable to Remote Code Execution due to a flaw that allows privileged dashboard users to exploit a crafted DHCP static lease.

What is CVE-2020-8816?

CVE-2020-8816 is a critical vulnerability in Pi-hole Web v4.3.2 that enables remote attackers with dashboard privileges to execute arbitrary code through a specially crafted DHCP static lease.

The Impact of CVE-2020-8816

The impact of this vulnerability is severe, with a CVSS base score of 9.1 (Critical). It can lead to high confidentiality, integrity, and availability impacts, requiring high privileges and no user interaction for exploitation.

Technical Details of CVE-2020-8816

Pi-hole Web v4.3.2 vulnerability details and affected systems.

Vulnerability Description

CVE ID: CVE-2020-8816
CVSS Base Score: 9.1 (Critical)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Changed
Vector String: CVSS:3.0/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:N

Affected Systems and Versions

Affected Version: v4.3.2
Product: Pi-hole Web

Exploitation Mechanism

The vulnerability can be exploited by privileged dashboard users through a specifically crafted DHCP static lease.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2020-8816.

Immediate Steps to Take

Update Pi-hole Web to the latest version v4.3.3.
Monitor network traffic for any suspicious activities.
Restrict dashboard privileges to essential users only.

Long-Term Security Practices

Regularly update and patch all software and systems.
Implement network segmentation to limit the impact of potential breaches.
Conduct security audits and penetration testing periodically.

Patching and Updates

Apply patches and updates promptly to address known vulnerabilities and enhance system security.