Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows…
Priority MEDIUM 55CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by leveraging an ntpq query and sending a response with a crafted array.
Why it matters now
EPSS 0.10213 95th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ntp:ntp:4.2.8:p10:*:*:*:*:*:* | 4.2.8 p10 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:* | 4.2.8 p6 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:* | 4.2.8 p7 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.8:p8:*:*:*:*:*:* | 4.2.8 p8 | Vulnerable | NTP Project |
| cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:* | 4.2.8 p9 | Vulnerable | NTP Project |
| cpe:2.3:o:freebsd:freebsd:10.3:*:*:*:*:*:*:* | 10.3 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* | 10.4 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:11.1:*:*:*:*:*:*:* | 11.1 | Vulnerable | FreeBSD |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
- cpe:2.3:a:ntp:ntp:4.2.8:p10:*:*:*:*:*:* Versions 4.2.8 p10 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:* Versions 4.2.8 p6 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:* Versions 4.2.8 p7 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.8:p8:*:*:*:*:*:* Versions 4.2.8 p8 Vulnerable ·NTP Project
- cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:* Versions 4.2.8 p9 Vulnerable ·NTP Project
- cpe:2.3:o:freebsd:freebsd:10.3:*:*:*:*:*:*:* Versions 10.3 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* Versions 10.4 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:11.1:*:*:*:*:*:*:* Versions 11.1 Vulnerable ·FreeBSD
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* | 17.10 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:a:netapp:element_software:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2018-7183
- 2026-10-03 Alias added: GHSA-9429-whv8-4h3p
References
Advisory 8
Sources
- CVE-2018-7183 · CVE Program
- CVE-2018-7183 · NVD
- FIRST EPSS
- GHSA-9429-whv8-4h3p · GitHub Advisory Database · CC BY 4.0
- CVE-2018-7183 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences