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CVE-2020-11108

8.8 · HIGH

The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload arbitrary files.

Published May 11, 2020CWE-434EPSS 78.26%

Overview

CVE-2020-11108 is a high-severity vulnerability. It was published on May 11, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

The Gravity updater in Pi-hole through 4.4 allows an authenticated adversary to upload arbitrary files. This can be abused for Remote Code Execution by writing to a PHP file in the web directory. (Also, it can be used in conjunction with the sudo rule for the www-data user to escalate privileges to root.) The code error is in gravity_DownloadBlocklistFromUrl in gravity.sh.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/157623/Pi-hole-4.4-Remote-Code-Execution.htmlRefpacketstormsecurity.com/files/157624/Pi-hole-4.4-Remote-Code-Execution-Privilege-Escalation.htmlRefpacketstormsecurity.com/files/157748/Pi-Hole-heisenbergCompensator-Blocklist-OS-Command-Execution.htmlRefpacketstormsecurity.com/files/157839/Pi-hole-4.4.0-Remote-Code-Execution.htmlReffrichetten.com/blog/cve-2020-11108-pihole-rce/GitHubgithub.com/Frichetten/CVE-2020-11108-PoCRefpacketstormsecurity.com/files/157623/Pi-hole-4.4-Remote-Code-Execution.htmlRefpacketstormsecurity.com/files/157624/Pi-hole-4.4-Remote-Code-Execution-Privilege-Escalation.htmlRefpacketstormsecurity.com/files/157748/Pi-Hole-heisenbergCompensator-Blocklist-OS-Command-Execution.htmlRefpacketstormsecurity.com/files/157839/Pi-hole-4.4.0-Remote-Code-Execution.html

How CyberStrike helps

Frequently asked questions

What is CVE-2020-11108?

CVE-2020-11108 is a high-severity vulnerability. It was published on May 11, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2020-11108?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-11108?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-11108?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-11108 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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