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NVD / CVE Program· CNA talos

CVE-2016-9042: An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9.

MediumCVSS 5.9 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.8% (FIRST EPSS); higher than 90.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: ntp (Debian:11) 1:4.2.8p10+dfsg-1; ntp (openSUSE:Tumbleweed) 4.2.8p15-7.2; ntp (SUSE:Linux Enterprise Desktop 12 SP1) 4.2.8p10-60.1.
  • Severity is disputed: the assigning authority (CNA) scores it 3.7, NVD 5.9.

Low priority for now. Upgrade to ntp (Debian:11) 1:4.2.8p10+dfsg-1; ntp (openSUSE:Tumbleweed) 4.2.8p15-7.2; ntp (SUSE:Linux Enterprise Desktop 12 SP1) 4.2.8p10-60.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Jun 4, 2018
Updated
Jun 16, 2026
EPSS
3.8% · 90th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
23 / 40 · 5.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.8%

CNA vs NVD score

NVD
5.9
CNA · talos
3.7
2.2 point gap

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ntpntp
freebsdfreebsd
hpehpux-ntp
siemenssimatic net cp 443-1 opc ua firmware
siemenssimatic net cp 443-1 opc ua

Versions reported by the vendor

Affected version ranges reported by the assigning authority (talos). Independent of NVD's CPE analysis and usually ahead of it.

  • Talos Network Time Protocol

    • NTP 4.2.8p9affected
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • freebsd freebsd10.0
  • freebsd freebsd11.0
  • hpe hpux-ntpbefore c.4.2.8.4.0
  • ntp ntp4.2.8
  • siemens simatic net cp 443-1 opc ua firmwareall versions

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11ntpbefore 1:4.2.8p10+dfsg-11:4.2.8p10+dfsg-1
openSUSE:Tumbleweedntpbefore 4.2.8p15-7.24.2.8p15-7.2
SUSE:Linux Enterprise Desktop 12 SP1ntpbefore 4.2.8p10-60.14.2.8p10-60.1
SUSE:Linux Enterprise Server 11 SP4ntpbefore 4.2.8p10-63.14.2.8p10-63.1
SUSE:Linux Enterprise Server for SAP Applications 12ntpbefore 4.2.8p10-46.23.14.2.8p10-46.23.1

Same product

ntp: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-7871Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.
    64This week
  • CVE-2014-9295Multiple stack-based buffer overflows in ntpd in NTP before 4.2.8 allow remote attackers to execute arbitrary code via a crafted packet…
    54Plan
  • CVE-2013-5211The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic…
    49Plan

Published before and after this one in the same product

  • ← EarlierCVE-2018-7185Mar 6, 2018 · The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending…
    33Monitor
  • ← EarlierCVE-2018-7183Mar 8, 2018 · Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by…
    42Plan
  • Later →CVE-2018-12327Jun 20, 2018 · Stack-based buffer overflow in ntpq and ntpdc of NTP version 4.2.8p11 allows an attacker to achieve code execution or escalate to higher…
    47Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ntp1:4.2.8p10+dfsg-1 · Debian:11Package registry (OSV)
opensuse:ntp4.2.8p15-7.2 · openSUSE:TumbleweedPackage registry (OSV)
suse:ntp4.2.8p10-46.23.1 · SUSE:Linux Enterprise Server for SAP Applications 12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (17 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records