The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows…
Priority MEDIUM 42CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 16 fixed, 1 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands.
Why it matters now
EPSS 0.06483 93rd percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 16 fixed, 1 without a fix
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 · 25
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* | 21 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* | 22 | Vulnerable | Fedoraproject |
| cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp2:*:*:*:*:*:* | 11 sp2 | Vulnerable | SUSE |
| cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp3:*:*:*:*:*:* | 11 sp3 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:ltss:*:*:* | 10 sp4 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:* | 11 sp2 | Vulnerable | SUSE |
| cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:* | 11 sp3 | Vulnerable | SUSE |
| cpe:2.3:o:suse:manager:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | SUSE |
| cpe:2.3:o:suse:manager_proxy:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | SUSE |
| cpe:2.3:o:suse:openstack_cloud:5:*:*:*:*:*:*:* | 5 | Vulnerable | SUSE |
- cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* Versions 21 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* Versions 22 Vulnerable ·Fedoraproject
- cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp2:*:*:*:*:*:* Versions 11 sp2 Vulnerable ·SUSE
- cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp3:*:*:*:*:*:* Versions 11 sp3 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:ltss:*:*:* Versions 10 sp4 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:* Versions 11 sp2 Vulnerable ·SUSE
- cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:* Versions 11 sp3 Vulnerable ·SUSE
- cpe:2.3:o:suse:manager:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·SUSE
- cpe:2.3:o:suse:manager_proxy:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·SUSE
- cpe:2.3:o:suse:openstack_cloud:5:*:*:*:*:*:*:* Versions 5 Vulnerable ·SUSE
Show 15 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* | 15.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* | 15.10 | Vulnerable | Canonical |
| cpe:2.3:a:ntp:ntp:*:p40:*:*:*:*:*:* | up to 4.2.7 | Vulnerable | NTP Project |
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* Versions 15.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* Versions 15.10 Vulnerable ·Canonical
- cpe:2.3:a:ntp:ntp:*:p40:*:*:*:*:*:* Versions up to 4.2.7 Vulnerable ·NTP Project
Remediation
Red Hat 2 advisories
- RHSA-2016:2583 Released 2016-11-03 · Red Hat rating Moderatentp security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
- Red Hat Enterprise Linux Client Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
- Red Hat Enterprise Linux Server (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
- Red Hat Enterprise Linux Server Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
- Red Hat Enterprise Linux Workstation (v. 7) ntp-4.2.6p5-25.el7, ntpdate-4.2.6p5-25.el7
- Red Hat Enterprise Linux Workstation Optional (v. 7) ntp-doc-4.2.6p5-25.el7, ntp-perl-4.2.6p5-25.el7, sntp-4.2.6p5-25.el7
- RHSA-2016:0780 Released 2016-05-10 · Red Hat rating Moderatentp security and bug fix update
- Red Hat Enterprise Linux Desktop (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
- Red Hat Enterprise Linux Desktop Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
- Red Hat Enterprise Linux HPC Node (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
- Red Hat Enterprise Linux Server (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
- Red Hat Enterprise Linux Server Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
- Red Hat Enterprise Linux Workstation (v. 6) ntp-4.2.6p5-10.el6, ntpdate-4.2.6p5-10.el6
- Red Hat Enterprise Linux Workstation Optional (v. 6) ntp-doc-4.2.6p5-10.el6, ntp-perl-4.2.6p5-10.el6
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2016:2583 |
Timeline
- 2026-10-02 Threatist record created from CVE-2015-5194
- 2026-10-03 Alias added: GHSA-3263-mvg8-28x9
References
Patch 4
Advisory 14
- SUSE-SU:2016:1912
- https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157
- USN-2783-1
- https://www-01.ibm.com/support/docview.wss?uid=swg21986956
- https://www-01.ibm.com/support/docview.wss?uid=swg21988706
- RHSA-2016:2583
- FEDORA-2015-77bfbc1bcd
- RHSA-2016:0780
- DSA-3388
- SUSE-SU:2016:2094
- SUSE-SU:2016:1311
- FEDORA-2015-14212
- https://www-01.ibm.com/support/docview.wss?uid=swg21989542
- https://www-01.ibm.com/support/docview.wss?uid=swg21985122
Sources
- CVE-2015-5194 · CVE Program
- CVE-2015-5194 · NVD
- FIRST EPSS
- GHSA-3263-mvg8-28x9 · GitHub Advisory Database · CC BY 4.0
- CVE-2015-5194 · Red Hat security data · CC BY 4.0
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