Command Injection in Pi-hole - CVE-2020-8816
Published: May 29, 2020 / Updated: February 20, 2022
Vulnerability identifier: #VU49027
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-8816
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.
The vulnerability exists due to improper input validation. A remote authenticated attacker can use a specially crafted DHCP static lease and execute arbitrary commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Pi-hole
How to mitigate CVE-2020-8816
Install updates from vendor's website.
Pi-hole - update to 4.3.3
Links to Public Exploits and PoC-codes
- Exploit #7361 - CVE-2020-8816 (A PoC for CVE-2020-8816 that does not use $PATH but $PWD and globbing) (February 18, 2022)
- Exploit #6689 - CVE-2020-8816 (Pi-hole Remote Code Execution authenticated Version >= 4.3.2) (September 2, 2021)
- Exploit #5685 - Pi-hole 4.3.2 - Remote Code Execution (Authenticated) (June 17, 2021)
- Exploit #4930 - Pi-Hole DHCP MAC OS Command Execution (December 16, 2020)
External References
- http://packetstormsecurity.com/files/157861/Pi-Hole-4.3.2-DHCP-MAC-OS-Command-Execution.html
- http://packetstormsecurity.com/files/158737/Pi-hole-4.3.2-Remote-Code-Execution.html
- https://github.com/pi-hole/AdminLTE/commits/master
- https://github.com/pi-hole/AdminLTE/pull/1165
- https://github.com/pi-hole/AdminLTE/releases/tag/v4.3.3
- https://natedotred.wordpress.com/2020/03/28/cve-2020-8816-pi-hole-remote-code-execution/
- https://twitter.com/Nate_Kappa/status/1243900213665902592?s=20