CVE-2016-9042

mediumpriority · track · 25EPSS 0.039 · 90 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.91% (90th) EPSS

CVSS 4.3 · medium

Is it mine?

12 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · cert_bund · cisa_csaf_ot

EPSS · scored 2026-10-23

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationSIMATIC CP 443-1 OPC UAsiemens_psirt
Configure an additional firewall to prevent communication to port udp/123 of an affected device
MitigationSIMATIC CP 443-1 OPC UAcisa_csaf_ot
Configure an additional firewall to prevent communication to port udp/123 of an affected device
No fix plannedSIMATIC CP 443-1 OPC UAsiemens_psirt
Currently no remediation is planned
No fix plannedSIMATIC CP 443-1 OPC UAcisa_csaf_ot
Currently no remediation is planned

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–5.9

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.03.7lowCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.03.7lowCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · talos-cna@cisco.com USexploitability 2.2 · impact 1.4

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20USCWE-20US

affected products (12)

Products and version ranges known to be affected.

Apple macOS <10.13all versionscert_bundDE
Apple macOS< 10.13cert_bundDE
SIMATIC CP 443-1 OPC UA (6GK7443-1UX00-0XE0)all versionscisa_csaf_otUS
Siemens SIMATIC CP 443-1 OPC UA≤ vers:all/*cisa_csaf_otUS
Talos Network Time Protocol≤ NTP 4.2.8p9enisa_euvdEU
freebsd freebsd= 10.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
hpe hpux-ntp< c.4.2.8.4.0nvdUScpe:2.3:a:hpe:hpux-ntp:*:*:*:*:*:*:*:*
ntp ntp= 4.2.8nvdUScpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
siemens simatic net cp 443-1 opc ua firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware:*:*:*:*:*:*:*:*
Siemens SIMATIC CP 443-1 OPC UA≤ vers:all/*siemens_psirtDE
Siemens SIMATIC CP 443-1 OPC UA (6GK7443-1UX00-0XE0)≤ vers:all/*siemens_psirtDE

advisories (3)

Vendor and ecosystem advisories describing this.

SSA-211752SSA-211752: Multiple NTP-Client Related Vulnerabilities in SIMATIC CP 443-1 OPC UA2021-06-08csaf · siemens_psirtDE
All versions of the SIMATIC CP 443-1 OPC UA contain multiple vulnerabilities in the underlying third party component NTP. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
WID-SEC-W-2025-0370Apple Mac OS: Mehrere SchwachstellenDeutsch2017-09-25csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstelle in Apple Mac OS ausnutzen, um Code mit Kernel Privilegien auszuführen, Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Angriff durchzuführen oder vertrauliche Daten einzusehen.
ICSA-21-159-11Siemens SIMATIC NET CP 443-1 OPC UA2021-06-08icsa · cisa_csaf_otUS
All versions of the SIMATIC CP 443-1 OPC UA contain multiple vulnerabilities in the underlying third party component NTP. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2018-06-04modified 2026-06-17

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references (66)

External citations — patches, advisories, analysis.

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