CVE-2020-11108

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.8 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 99%
VendorProductVersion
pi-holepi-hole
𝑥
≤ 4.4
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://packetstormsecurity.com/files/157623/Pi-hole-4.4-Remote-Code-Execution.html
http://packetstormsecurity.com/files/157624/Pi-hole-4.4-Remote-Code-Execution-Privilege-Escalation.html
http://packetstormsecurity.com/files/157748/Pi-Hole-heisenbergCompensator-Blocklist-OS-Command-Execution.html
http://packetstormsecurity.com/files/157839/Pi-hole-4.4.0-Remote-Code-Execution.html
https://frichetten.com/blog/cve-2020-11108-pihole-rce/
https://github.com/Frichetten/CVE-2020-11108-PoC
http://packetstormsecurity.com/files/157623/Pi-hole-4.4-Remote-Code-Execution.html
http://packetstormsecurity.com/files/157624/Pi-hole-4.4-Remote-Code-Execution-Privilege-Escalation.html
http://packetstormsecurity.com/files/157748/Pi-Hole-heisenbergCompensator-Blocklist-OS-Command-Execution.html
http://packetstormsecurity.com/files/157839/Pi-hole-4.4.0-Remote-Code-Execution.html
https://frichetten.com/blog/cve-2020-11108-pihole-rce/
https://github.com/Frichetten/CVE-2020-11108-PoC