---
cve: "CVE-2025-34323"
severity: "HIGH"
cvss: 8.5
epss: "0.3%"
vendor: "Nagios"
kev: false
exploited: false
published: "2025-11-17 18:15:56"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-20T03:30:42+02:00"
---

# CVE-2025-34323

> 8.5 HIGH

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-05-14 02:08:14
- CNA-CVSS: **8.5** (`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`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-732** — Incorrect Permission Assignment for Critical Resource
  The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

## Angriffsmuster (CAPEC)

- [CAPEC-1 — Accessing Functionality Not Properly Constrained by ACLs](https://capec.mitre.org/data/definitions/1.html) _(Severity: High)_
- [CAPEC-17 — Using Malicious Files](https://capec.mitre.org/data/definitions/17.html) _(Severity: Very High)_
- [CAPEC-60 — Reusing Session IDs (aka Session Replay)](https://capec.mitre.org/data/definitions/60.html) _(Severity: High)_
- [CAPEC-122 — Privilege Abuse](https://capec.mitre.org/data/definitions/122.html) _(Severity: Medium)_
- [CAPEC-127 — Directory Indexing](https://capec.mitre.org/data/definitions/127.html) _(Severity: Medium)_
- [CAPEC-180 — Exploiting Incorrectly Configured Access Control Security Levels](https://capec.mitre.org/data/definitions/180.html) _(Severity: Medium)_
- [CAPEC-206 — Signing Malicious Code](https://capec.mitre.org/data/definitions/206.html) _(Severity: Very High)_
- [CAPEC-234 — Hijacking a privileged process](https://capec.mitre.org/data/definitions/234.html) _(Severity: Medium)_

## ATT&CK-Techniken

- [T1574.010 — Hijack Execution Flow: ServicesFile Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)
- [T1574.005 — Hijack Execution Flow: Executable Installer File Permissions](https://attack.mitre.org/techniques/T1574/005/)
- [T1134.001 — Access Token Manipulation:Token Impersonation/Theft](https://attack.mitre.org/techniques/T1134/001/)
- [T1550.004 — Use Alternate Authentication Material:Web Session Cookie](https://attack.mitre.org/techniques/T1550/004/)
- [T1548 — Abuse Elevation Control Mechanism](https://attack.mitre.org/techniques/T1548/)
- [T1083 — File and Directory Discovery](https://attack.mitre.org/techniques/T1083/)
- [T1553.002 — Subvert Trust Controls:Code Signing](https://attack.mitre.org/techniques/T1553/002/)

## Referenzen

- <https://www.nagios.com/products/security/#log-server>
- <https://www.nagios.com/changelog/nagios-log-server/nagios-log-server-2026r1-0-1/>
- <https://www.vulncheck.com/advisories/nagios-log-server-local-privilege-escalation-via-writable-scripts-and-sudo-rules>
- <https://theyhack.me/Rooting-Nagios-Log-Server/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2025-34323/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_