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CVE-2018-13441

29
FAUCET Score

CVE-2018-13441 is a NULL pointer dereference vulnerability in the qh_help function of Nagios Core versions 4.4.1 and earlier. An attacker can exploit this by sending a crafted payload to the local UNIX socket, leading to a denial-of-service condition. This vulnerability has a medium severity CVSS score of 5.5, indicating a local attack vector with low complexity and high impact on availability. While not actively exploited in the wild and not on the KEV catalog, public exploit code exists on ExploitDB, though it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.4.1CPE matchmatch criteria
cpe:2.3:a:nagios:nagios:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.34%
Probability of exploitation in next 30 days
EPSS Percentile
68.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-45082 · Jul 24, 2018
This CVE's current EPSS score of 0.0134 is in the 98th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2018-13441Low

nagios: NULL pointer dereference in qh_help in base/query-handler.c

Jul 19, 2018

References

lists.opensuse.org / opensuse-security-announce/2020-04/msg00014.html
lists.opensuse.org / opensuse-security-announce/2020-04/msg00022.html
gist.github.com / fakhrizulkifli/8df4a174158df69ebd765f824bd736b8
ExploitThird Party Advisory
knowledge.opsview.com / v5.3/docs/whats-new
Release Notes
knowledge.opsview.com / v5.4/docs/whats-new
Release Notes
exploit-db.com / exploits/45082
ExploitThird Party AdvisoryVDB Entry