ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a…

Description

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at a certain time.

Scores

EPSS (exploitation in 30 days)

17.2% · top 2.9% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-287 (opens in a new tab)

Affected products

• n/a

  • affected n/a

References (32)

• SUSE-SU-2016:1602 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 91010 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• openSUSE-SU-2016:1583 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• FreeBSD-SA-16:24 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
• SUSE-SU-2016:1912 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://support.ntp.org/bin/view/Main/NtpBug3045 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1036037 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• SUSE-SU-2016:1584 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• SUSE-SU-2016:2094 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• VU#321640 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• http://support.ntp.org/bin/view/Main/SecurityNotice (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://bugs.ntp.org/3045 (opens in a new tab)x_refsource_CONFIRMx_transferred
• openSUSE-SU-2016:1636 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• SUSE-SU-2016:1563 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• GLSA-201607-15 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html (opens in a new tab)x_refsource_MISCx_transferred
• 20160603 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016 (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
• 20170607 [security bulletin] HPESBHF03757 rev.1 - HPE Network Products including Comware 5 and Comware 7 running NTP, Remote Denial of Service (DoS) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html (opens in a new tab)x_refsource_MISCx_transferred
• SUSE-SU-2016:1568 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20160604 [slackware-security] ntp (SSA:2016-155-01) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20170607 [security bulletin] HPESBHF03757 rev.1 - HPE Network Products including Comware 5 and Comware 7 running NTP, Remote Denial of Service (DoS) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20160604 FreeBSD Security Advisory FreeBSD-SA-16:24.ntp (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• VU#321640 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
• 20160604 [slackware-security] ntp (SSA:2016-155-01) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20160604 FreeBSD Security Advisory FreeBSD-SA-16:24.ntp (opens in a new tab)mailing-listx_refsource_BUGTRAQx_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_CONFIRMx_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)

Record last updated 6 Aug 2024, 00:46 UTC.