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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Pi-Hole Pi-Hole
cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:*
|
6.0
|
6.4.3
|
References 3
https://github.com/pi-hole/pi-hole/commit/18002bf7c6bf382fe5861d01321f427019e1b…
security-advisories@github.com
https://github.com/pi-hole/pi-hole/releases/tag/v6.4.3
security-advisories@github.com
https://github.com/pi-hole/pi-hole/security/advisories/GHSA-h8w9-qx2v-wrww
security-advisories@github.com