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CVE-2016-9042
An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted…
Low3.7EPSS 3.9%
- Published
- Updated
- Reserved
- Assigned by
- talos
Description
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.
Timeline
ID reserved
By talos
- 20 months later
· 20 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| talosCNA (assigner) | 3.0 | Low3.7 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.9% · top 9.6% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Weakness
- denial of service
- CWE-20 (opens in a new tab)All about CWE-20 and its CVEs
Affected products
- affected NTP 4.2.8p9
References (21)
- 1038123 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- FreeBSD-SA-17:03 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 1039427 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 97046 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- USN-3349-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 20170412 FreeBSD Security Advisory FreeBSD-SA-17:03.ntp (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20171101 APPLE-SA-2017-10-31-8 Additional information for APPLE-SA-2017-09-25-1 macOS High Sierra 10.13 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 20170412 FreeBSD Security Advisory FreeBSD-SA-17:03.ntp (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- FEDORA-2017-20d54b2782 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- 20170925 APPLE-SA-2017-09-25-1 macOS High Sierra 10.13 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 20170422 [slackware-security] ntp (SSA:2017-112-02) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0260 (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/142101/FreeBSD-Security-Advisory-FreeBSD-SA-17-03.ntp.html (opens in a new tab)x_refsource_MISCx_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10201 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.apple.com/kb/HT208144 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.f5.com/csp/article/K39041624 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bto.bluecoat.com/security-advisory/sa147 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://packetstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.html (opens in a new tab)x_refsource_MISCx_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-9042)Record last updated .