MEDIUM
ntp: ntpq atoascii memory corruption vulnerability
Published Aug 7, 2017
5.9
MEDIUMCVSS 3.1
EPSS 12.28%
Description
ntpq in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (crash) via crafted mode 6 response packets.
Affected products
No data.
Configuration 1
OR
- ≥ 4.2.0 · < 4.2.8
- ≥ 4.3.0 · < 4.3.77
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
- 4.2.8
Configuration 2
OR
- 7.0
- 8.0
- 9.0
Configuration 3
OR
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 5
OR
- 6.0
- 7.0
- 6.0
- 7.0
- 7.3
- 7.4
- 7.6
- 7.7
- 7.3
- 7.4
- 7.5
- 7.6
- 7.7
- 7.3
- 7.6
- 7.7
- 6.0
- 7.0
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.
5.9 MEDIUM NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity High
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.
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
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.
12.28% 0.12282
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.12282
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 (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 12.28% (0.12282) | 96.07th | v5 (v2026.06.15) |
| Jun 15, 2026 | 12.38% (0.12380) | 95.67th | v5 (v2026.06.15) |
| May 25, 2026 | 3.75% (0.03746) | 88.17th | v4 (v2025.03.14) |
| Feb 18, 2026 | 2.70% (0.02702) | 85.56th | v4 (v2025.03.14) |
| Jan 25, 2026 | 3.72% (0.03722) | 87.66th | v4 (v2025.03.14) |
| Jan 20, 2026 | 4.81% (0.04812) | 89.18th | v4 (v2025.03.14) |
| Jan 18, 2026 | 3.62% (0.03625) | 87.47th | v4 (v2025.03.14) |
| Dec 16, 2025 | 4.84% (0.04843) | 89.15th | v4 (v2025.03.14) |
| Dec 14, 2025 | 5.86% (0.05863) | 90.22th | v4 (v2025.03.14) |
| Dec 4, 2025 | 4.56% (0.04557) | 88.76th | v4 (v2025.03.14) |
| Jul 9, 2025 | 3.17% (0.03170) | 86.39th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.46% (0.04458) | 88.03th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.16% (0.12164) | 89.68th | v4 (v2025.03.14) |
| Mar 28, 2025 | 4.46% (0.04458) | 88.05th | v4 (v2025.03.14) |
| Mar 27, 2025 | 12.16% (0.12164) | 92.83th | v4 (v2025.03.14) |
| Mar 20, 2025 | 4.46% (0.04458) | 88.11th | v4 (v2025.03.14) |
| Mar 19, 2025 | 12.16% (0.12164) | 92.95th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.46% (0.04458) | 88.32th | v4 (v2025.03.14) |
| Dec 17, 2024 | 8.91% (0.08905) | 94.58th | v3 (v2023.03.01) |
| Jul 10, 2024 | 4.38% (0.04375) | 92.45th | v3 (v2023.03.01) |
| May 28, 2024 | 4.12% (0.04120) | 92.16th | v3 (v2023.03.01) |
| Nov 11, 2023 | 3.70% (0.03699) | 90.72th | v3 (v2023.03.01) |
| Oct 3, 2023 | 5.08% (0.05080) | 91.99th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.55% (0.04549) | 91.22th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
Weaknesses (2)
References (14)
- 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://support.ntp.org/bin/view/Main/NtpBug2919 x_refsource_CONFIRMPatchVendor Advisory
- http://talosintel.com/reports/TALOS-2015-0063/
- http://www.debian.org/security/2015/dsa-3388 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/77288 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1033951 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-7852 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1274261 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-7852
- https://security.gentoo.org/glsa/201607-15 vendor-advisoryx_refsource_GENTOOThird Party AdvisoryVDB Entry
- https://security.netapp.com/advisory/ntap-20171004-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7852
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 7, 2017
Updated Aug 6, 2024
Reserved Oct 16, 2015
Link CVE-2015-7852
CISA Vulnrichment
Updated n/a