Local Privilege Escalation in Nagios Log Server by Nagios
CVE-2025-34323

8.5HIGH

Key Information:

Vendor

NagiOS

Status
Log Server
Vendor
CVE Published:
17 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-34323?

Nagios Log Server versions before 2026R1.0.1 are susceptible to local privilege escalation. This issue arises from an unsafe interaction between sudo rules and file system permissions. The web server account possesses passwordless sudo access to particular maintenance scripts and concurrently belongs to a group with write access to the directory where these scripts are stored. A local attacker, acting as the web server user, can replace one of the allowed scripts with a malicious executable and subsequently invoke it through sudo, leading to arbitrary code execution with root privileges.

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Affected Version(s)

Log Server 0 < 2026R1.0.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34323 - Proof of Concept

References

https://www.nagios.com/products/security/#log-server
vendor-advisorypatch
https://www.nagios.com/changelog/nagios-log-server/nagios...
release-notespatch
https://www.vulncheck.com/advisories/nagios-log-server-lo...
third-party-advisory

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

M. Cory Billington of theyhack.me
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