HIGH
ntp: infinite loop in sntp processing crafted packet
Published Jul 21, 2017
7.5
HIGHCVSS 3.1
EPSS 5.84%
Description
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.
Affected products
No data.
Configuration 1
OR
- 21
- 22
- 23
Configuration 2
OR
- 11
- 11
- 10
- 11
- 11
- 2.1
- 2.1
- 5
Configuration 3
OR
- 6.0
- 7.0
- 6.0
- 7.0
- 6.0
- 7.0
- 6.0
- 7.0
Configuration 4
OR
- 7.0
- 8.0
Configuration 5
OR
- 12.04
- 14.04
- 15.04
- 15.10
Configuration 8
AND
- n/a
Configuration 9
AND
- n/a
Running on/with
- n/a
No data.
Red Hat Enterprise Linux 6
ntp-0:4.2.6p5-10.el6
Fixed · RHSA-2016:0780
Red Hat Enterprise Linux 7
ntp-0:4.2.6p5-25.el7
Fixed · RHSA-2016:2583
Red Hat Enterprise Linux 5
ntp
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | ntp-0:4.2.6p5-10.el6 | Fixed | RHSA-2016:0780 |
| Red Hat Enterprise Linux 7 | ntp-0:4.2.6p5-25.el7 | Fixed | RHSA-2016:2583 |
| Red Hat Enterprise Linux 5 | ntp | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.84% 0.05839
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.05839
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.84% (0.05839) | 92.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.89% (0.05887) | 92.25th | v5 (v2026.06.15) |
| Jan 18, 2026 | 2.31% (0.02313) | 84.36th | v4 (v2025.03.14) |
| Jun 26, 2025 | 3.64% (0.03640) | 87.33th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.75% (0.01748) | 81.29th | v4 (v2025.03.14) |
| Mar 8, 2025 | 9.70% (0.09698) | 94.95th | v3 (v2023.03.01) |
| Dec 17, 2024 | 8.58% (0.08582) | 94.47th | v3 (v2023.03.01) |
| Dec 12, 2024 | 1.93% (0.01934) | 89.12th | v3 (v2023.03.01) |
| Jun 23, 2024 | 1.36% (0.01360) | 86.26th | v3 (v2023.03.01) |
| May 11, 2024 | 1.32% (0.01317) | 85.86th | v3 (v2023.03.01) |
| Apr 4, 2024 | 1.03% (0.01033) | 83.57th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.03% (0.01033) | 81.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.36% (0.04358) | 88.02th | v2 (v2022.01.01) |
| Feb 13, 2023 | 4.36% (0.04358) | 87.63th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.36% (0.04358) | 86.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.36% (0.04358) | 70.59th | v2 (v2022.01.01) |
References (27)
- http://aix.software.ibm.com/aix/efixes/security/ntp_advisory4.asc x_refsource_CONFIRMThird Party Advisory
- http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=51786731Gr4-NOrTBC_a_uXO4wuGhg x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html vendor-advisoryx_refsource_FEDORAMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html vendor-advisoryx_refsource_FEDORAMailing ListThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html vendor-advisoryx_refsource_FEDORAMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html vendor-advisoryx_refsource_SUSEBroken Link
- http://rhn.redhat.com/errata/RHSA-2016-0780.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2583.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.debian.org/security/2015/dsa-3388 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/08/25/3 mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/76473 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2783-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-5219 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1255118 x_refsource_CONFIRMIssue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf x_refsource_CONFIRMThird Party Advisory
- https://github.com/ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-5219
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 x_refsource_CONFIRMThird Party AdvisoryUS Government Resource
- https://www-01.ibm.com/support/docview.wss?uid=isg3T1024157 x_refsource_CONFIRMThird Party Advisory
- https://www-01.ibm.com/support/docview.wss?uid=swg21985122 x_refsource_CONFIRMThird Party Advisory
- https://www-01.ibm.com/support/docview.wss?uid=swg21986956 x_refsource_CONFIRMThird Party Advisory
- https://www-01.ibm.com/support/docview.wss?uid=swg21988706 x_refsource_CONFIRMThird Party Advisory
- https://www-01.ibm.com/support/docview.wss?uid=swg21989542 x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-5219
- https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099409 x_refsource_CONFIRMThird Party Advisory
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Jul 21, 2017
Updated Aug 6, 2024
Reserved Jul 1, 2015
Link CVE-2015-5219
CISA Vulnrichment
Updated n/a