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CVE-2016-1550
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec…
Medium5.3EPSS 3.6%
- Published
- Updated
- Reserved
- Assigned by
- certcc
Description
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 3.6% · top 11% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
NTP Project · NTP
- affected 4.2.8p3
- affected 4.2.8p4
NTPsec Project · NTPSec
- affected a5fb34b9cc89b92a8fef2f459004865c93bb7f92
References (34)
- USN-3096-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-3629 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2016:1141 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- SUSE-SU-2016:1912 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- VU#718152 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- RHSA-2016:1552 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 1035705 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://security.netapp.com/advisory/ntap-20171004-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.talosintelligence.com/reports/TALOS-2016-0084/ (opens in a new tab)x_refsource_MISCx_transferred
- 20160428 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: April 2016 (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- FreeBSD-SA-16:16 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 88261 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- SUSE-SU-2016:2094 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2016:1423 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- GLSA-201607-15 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- openSUSE-SU-2016:1329 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html (opens in a new tab)x_refsource_MISCx_transferred
- SUSE-SU-2016:1471 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2016-5b2eb0bf9c (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- SUSE-SU-2016:1291 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- DSA-3629 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084 (opens in a new tab)x_refsource_MISCx_transferred
- 20160429 [slackware-security] ntp (SSA:2016-120-01) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- SUSE-SU-2016:1568 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 20160429 [slackware-security] ntp (SSA:2016-120-01) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- SUSE-SU-2016:1278 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- FEDORA-2016-ed8c6c0426 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 (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
- https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19 (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)
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[](https://trackcve.app/cve/CVE-2016-1550)Record last updated .