CVE-2025-34323
Nagios Log Server < 2026R1.0.1 Local Privilege Escalation via Writable Scripts and Sudo Rules
Nagios Log Server versions prior to 2026R1.0.1 are vulnerable to local privilege escalation due to a combination of sudo misconfiguration and group-writable application directories. The 'www-data' user is a member of the 'nagios' group, which has write access to '/usr/local/nagioslogserver/scripts', while several scripts in this directory are owned by root and may be executed via sudo without a password. A local attacker running as 'www-data' can move one of these root-owned scripts to a backup name and create a replacement script with attacker-controlled content at the original path, then invoke it with sudo. This allows arbitrary commands to be executed with root privileges, providing full compromise of the underlying operating system.
- Affected
- Nagios · Log Server
- CVSS v4.0 VULNCHECK
- 8.5 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 NVD
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 0.35% chance of exploitation in the next 30 days, 27th percentile
- Published
- 2025-11-17
- Updated
- 2026-05-14
Proof-of-concept exploits (2)
- https://theyhack.me/Rooting-Nagios-Log-Server/
- mcorybillington/CVE-2025-34322_CVE-2025-34323_Nagios_Log_Server0★ · 2025-11-26
Security advisories
- https://www.nagios.com/products/security/#log-server
- https://www.vulncheck.com/advisories/nagios-log-server-local-privilege-escalation-via-wri…
- https://www.nagios.com/changelog/nagios-log-server/nagios-log-server-2026r1-0-1