CVE-2018-13457
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability,...
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
5.5
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
CVE-2018-13457- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
CVE-2018-13457- Updated
- 2026-11-02
EUVDEUVD-2018-5395 No score
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
EUVD-2018-5395- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6rvq-8cg9-gm39
5.5
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability,...
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
GHSA-6rvq-8cg9-gm39- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSV
5.5
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
CVE-2018-13457- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-13457
5.5
qh_echo in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.
- Record
DEBIAN-CVE-2018-13457- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2019-0104 No score
Updated nagios packages fix security vulnerability
A flaw was found in Nagios Core version 4.4.1 and earlier. The qh_help function 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 (CVE-2018-13441).
A flaw was found in Nagios Core version 4.4.1 and earlier. The qh_echo function 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 (CVE-2018-13457).
A flaw was found in Nagios Core version 4.4.1 and earlier. The qh_core function 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 (CVE-2018-13458).
A cross-site scripting (XSS) vulnerability has been discovered in Nagios Core. This vulnerability allows attackers to place malicious JavaScript code into the web frontend through manipulation of plugin output. In order to do this the attacker needs to be able to manipulate the output returned by nagios checks, e.g. by replacing a plugin on one of the monitored endpoints. Execution of the payload then requires that an authenticated user creates an alert summary report which contains the corresponding output (CVE-2018-18245).
- Record
MGASA-2019-0104- Updated
- 2026-11-02
OSVopenSUSE-SU-2020:0500-1 No score
Security update for nagios
This update for nagios to version 4.4.5 fixes the following issues:
- CVE-2019-3698: Symbolic link following vulnerability in the cronjob allows local attackers to cause cause DoS or potentially escalate privileges. (boo#1156309)
- CVE-2018-18245: Fixed XSS vulnerability in Alert Summary report (boo#1119832)
- CVE-2018-13441, CVE-2018-13458, CVE-2018-13457: Fixed a few denial of service vulnerabilities caused by null pointer dereference (boo#1101293, boo#1101289, boo#1101290).
- Record
openSUSE-SU-2020:0500-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2020:0517-1 No score
Security update for nagios
This update for nagios to version 4.4.5 fixes the following issues:
- CVE-2019-3698: Symbolic link following vulnerability in the cronjob allows local attackers to cause cause DoS or potentially escalate privileges. (boo#1156309)
- CVE-2018-18245: Fixed XSS vulnerability in Alert Summary report (boo#1119832)
- CVE-2018-13441, CVE-2018-13458, CVE-2018-13457: Fixed a few denial of service vulnerabilities caused by null pointer dereference (boo#1101293, boo#1101289, boo#1101290).
This update was imported from the openSUSE:Leap:15.1:Update update project.
- Record
openSUSE-SU-2020:0517-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nagios4Debian:12 |
before 4.3.4-3 | 4.3.4-3 |
nagios4Debian:13 |
before 4.3.4-3 | 4.3.4-3 |
nagios4Debian:14 |
before 4.3.4-3 | 4.3.4-3 |
nagiosMageia:6 From an advisory covering 4 CVEs |
before 4.3.1-2.2.mga6 | 4.3.1-2.2.mga6 |
nagiosopenSUSE:Leap 15.1 From an advisory covering 5 CVEs |
before 4.4.5-lp151.5.4.1 | 4.4.5-lp151.5.4.1 |
nagiosSUSE:Package Hub 15 SP1 From an advisory covering 5 CVEs |
before 4.4.5-bp151.4.3.1 | 4.4.5-bp151.4.3.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Nagios Core 4.4.1 - Denial of Service | 2018-07-24 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-13457 is a medium vulnerability (CVSS 5.5) in Nagios Core, published July 12, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.45%, the 91st percentile. Fixed in nagios4 4.3.4-3.
References
knowledge.opsview.com/v5.4/docs/whats-new
gist.github.com/fakhrizulkifli/87cf1c1ad403b4d40a86d90c9c9bf7ab
exploit-db.com/exploits/45082
knowledge.opsview.com/v5.3/docs/whats-new
lists.opensuse.org/opensuse-security-announce/2020-04/msg00014.html
lists.opensuse.org/opensuse-security-announce/2020-04/msg00022.html
Show 16 moreShow less
nvd.nist.gov/vuln/detail/CVE-2018-13457
github.com/advisories/GHSA-6rvq-8cg9-gm39
security-tracker.debian.org/tracker/CVE-2018-13457
advisories.mageia.org/MGASA-2019-0104.html
bugs.mageia.org/show_bug.cgi?id=24290
lists.fedoraproject.org/archives/list/[email protected]/thread/3EGOZ3JA6TL3YUZ3XWYQ47OYQAJTWOTL
lists.opensuse.org/archives/list/[email protected]/thread/HKTKWPRP5BSNBXHHJ3JC2CHRRZALRC26
bugzilla.suse.com/1028975
bugzilla.suse.com/1119832
bugzilla.suse.com/1156309
suse.com/security/cve/CVE-2018-13441
suse.com/security/cve/CVE-2018-13457
suse.com/security/cve/CVE-2018-13458
suse.com/security/cve/CVE-2018-18245
suse.com/security/cve/CVE-2019-3698
lists.opensuse.org/archives/list/[email protected]/thread/G5J75GK25DTTK4SXS4VCSBZ3KBQ2JPAU