Description
Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. From 6.0 to 6.4.2, a user with code execution as the unprivileged pihole user can escalate to root by replacing /etc/pihole/logrotate. The replacement is laundered to root:root ownership by pihole-FTL-prestart.sh and then parsed as root by the daily pihole flush cron, executing firstaction shell as uid 0. This issue is fixed in version 6.4.3.
Affected products
pi-hole: pi-hole
References4
- github.com/pi-hole/pi-hole/security/advisories/GHSA-h8w9-qx2v-w… ExploitMitigationVendor Advisory
- github.com/pi-hole/pi-hole/security/advisories/GHSA-h8w9-qx2v-w… ExploitMitigationVendor Advisory
- github.com/pi-hole/pi-hole/commit/18002bf7c6bf382fe5861d01321f4… Patch
- github.com/pi-hole/pi-hole/releases/tag/v6.4.3 ProductRelease Notes
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 17 · as of 15 November 2026
- CWE
- CWE-282
Could this be exploited in your environment?
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