CVE-2020-12620 : What You Need to Know
Learn about CVE-2020-12620, a Pi-hole 4.4 vulnerability allowing privilege escalation through command injection. Find out how to mitigate and prevent this security issue.
Pi-hole 4.4 allows a user to escalate privileges through command injection by writing to /etc/pihole/dns-servers.conf.
Understanding CVE-2020-12620
Pi-hole 4.4 vulnerability allows for privilege escalation through command injection.
What is CVE-2020-12620?
Pi-hole 4.4 enables a user with write access to /etc/pihole/dns-servers.conf to elevate privileges by exploiting shell metacharacters after an IP address.
The Impact of CVE-2020-12620
This vulnerability could be exploited by an attacker to execute arbitrary commands with elevated privileges on the affected system.
Technical Details of CVE-2020-12620
Pi-hole 4.4 vulnerability details.
Vulnerability Description
The flaw in Pi-hole 4.4 allows an attacker to inject commands after an IP address in /etc/pihole/dns-servers.conf, leading to privilege escalation.
Affected Systems and Versions
- Product: Pi-hole 4.4
- Vendor: N/A
- Versions: N/A
Exploitation Mechanism
The vulnerability arises from improper input validation, enabling an attacker to insert malicious commands after an IP address.
Mitigation and Prevention
Steps to address CVE-2020-12620.
Immediate Steps to Take
- Restrict access to sensitive files like /etc/pihole/dns-servers.conf
- Regularly monitor system logs for suspicious activities
Long-Term Security Practices
- Implement the principle of least privilege to limit user access
- Conduct regular security audits and penetration testing
Patching and Updates
- Apply patches and updates provided by Pi-hole to fix the vulnerability