CVE-2015-5219

The ULOGTOD function in ntp.d in SNTP before 4.2.7p366 does not properly perform type conversions from a precision value to a double, which allows remote attackers to cause a denial of service (infinite loop) via a crafted NTP packet.

Published: 2017-07-21 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-5219 is rated Moderate Risk (59.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.24%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-5219

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-25 2.31% 2.24% -0.07%
2 2026-01-18 3.11% 2.31% -0.80%
3 2025-12-28 — 3.11% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-5219

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2015-5219

OS Trackers for CVE-2015-5219

vendor priority summary link
debian low CVE-2015-5219 low priority: Debian including 1 source packages (ntp), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2015-5219
redhat low — https://access.redhat.com/security/cve/CVE-2015-5219
suse high CVE-2015-5219 severity important: SUSE including 22 source package names (ntp, ntp-4.2.6p5-25.el7, …), 85 product×package rows across 50 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (50 product lines)): Fixed 79, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2015-5219/
ubuntu low CVE-2015-5219 low priority: Ubuntu including 1 source packages (ntp), 5 status rows across 5 suites (precise, trusty, upstream, vivid, wily): released 4, needed 1. https://ubuntu.com/security/CVE-2015-5219

Affected software / configurations for CVE-2015-5219

Vendor Product Version Raw CPE
fedoraproject fedora 21 cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
fedoraproject fedora 22 cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
fedoraproject fedora 23 cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
suse linux_enterprise_debuginfo 11 cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp2:*:*:*:*:*:*
suse linux_enterprise_debuginfo 11 cpe:2.3:a:suse:linux_enterprise_debuginfo:11:sp3:*:*:*:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:ltss:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*
suse manager 2.1 cpe:2.3:o:suse:manager:2.1:*:*:*:*:*:*:*
suse manager_proxy 2.1 cpe:2.3:o:suse:manager_proxy:2.1:*:*:*:*:*:*:*
suse openstack_cloud 5 cpe:2.3:o:suse:openstack_cloud:5:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 6.0 cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_hpc_node 6.0 cpe:2.3:o:redhat:enterprise_linux_hpc_node:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_hpc_node 7.0 cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 6.0 cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 6.0 cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 15.04 cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
canonical ubuntu_linux 15.10 cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
ntp ntp <= 4.2.7 cpe:2.3:a:ntp:ntp:*:p355:*:*:*:*:*:*
novell leap 42.2 cpe:2.3:o:novell:leap:42.2:*:*:*:*:*:*:*
opensuse leap 42.1 cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
siemens tim_4r-ie_firmware — cpe:2.3:o:siemens:tim_4r-ie_firmware:*:*:*:*:*:*:*:*
siemens tim_4r-id_dnp3_firmware — cpe:2.3:o:siemens:tim_4r-id_dnp3_firmware:*:*:*:*:*:*:*:*
oracle linux 6 cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:*

References for CVE-2015-5219

URL Tags
http://aix.software.ibm.com/aix/efixes/security/ntp_advisory4.asc Third Party Advisory
http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=51786731Gr4-NOrTBC_a_uXO4wuGhg Issue Tracking Patch Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html Broken Link
http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html Broken Link
http://rhn.redhat.com/errata/RHSA-2016-0780.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2583.html Third Party Advisory
http://www.debian.org/security/2015/dsa-3388 Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/08/25/3 Mailing List Patch Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securityfocus.com/bid/76473 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2783-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1255118 Issue Tracking
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf Third Party Advisory
https://github.com/ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8 Issue Tracking Patch Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 Third Party Advisory US Government Resource
https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21985122 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21986956 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21988706 Third Party Advisory
https://www-01.ibm.com/support/docview.wss?uid=swg21989542 Third Party Advisory
https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099409 Third Party Advisory
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