CVE-2018-13441

MEDIUM

Nagios < 4.4.1 - Denial of Service via qh_help NULL Pointer Dereference

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-13441. PoCs published by Fakhri Zulkifli.

AI-analyzed exploit summary This exploit demonstrates a NULL pointer dereference vulnerability in Nagios Core 4.4.1 and earlier, allowing local denial-of-service attacks via crafted payloads sent to a UNIX socket. The PoC includes specific commands for three CVEs (CVE-2018-13458, CVE-2018-13457, CVE-2018-13441).

Description

qh_help in Nagios Core version 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attacker to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.

Exploits (1)

exploitdb WORKING POC
by Fakhri Zulkifli · textdoslinux
https://www.exploit-db.com/exploits/45082

This exploit demonstrates a NULL pointer dereference vulnerability in Nagios Core 4.4.1 and earlier, allowing local denial-of-service attacks via crafted payloads sent to a UNIX socket. The PoC includes specific commands for three CVEs (CVE-2018-13458, CVE-2018-13457, CVE-2018-13441).

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Nagios Core 4.4.1 and earlier
No auth needed
Prerequisites: Local access to the target system · Presence of Nagios Core UNIX socket
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Release Notes x_refsource_confirm
https://knowledge.opsview.com/v5.4/docs/whats-new
Exploit, Third Party Advisory x_refsource_misc
https://gist.github.com/fakhrizulkifli/8df4a174158df69ebd765f824bd736b8
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45082/
Release Notes x_refsource_confirm
https://knowledge.opsview.com/v5.3/docs/whats-new

Scores

CVSS v3 5.5
EPSS 0.0134
EPSS Percentile 67.7%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
nagios/nagios < 4.4.1
Published Jul 12, 2018
Tracked Since Feb 18, 2026