The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large…

Description

The rate limiting feature in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to have unspecified impact via a large number of crafted requests.

Scores

EPSS (exploitation in 30 days)

12.2% · top 3.8% 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: Critical 9.8.

Weakness

• n/a
• CWE-20 (opens in a new tab)

Affected products

• n/a

  • affected n/a

References (36)

• 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
• USN-2783-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• SUSE-SU-2016:1247 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 77284 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• https://support.citrix.com/article/CTX220112 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 1033951 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_4_2_8p4_Securit (opens in a new tab)x_refsource_CONFIRMx_transferred
• SUSE-SU-2016:1311 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://www.cs.bu.edu/~goldbe/NTPattack.html (opens in a new tab)x_refsource_MISCx_transferred
• SUSE-SU-2016:2094 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://eprint.iacr.org/2015/1020.pdf (opens in a new tab)x_refsource_MISCx_transferred
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://bugzilla.redhat.com/show_bug.cgi?id=1274184 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://support.ntp.org/bin/view/Main/NtpBug2901 (opens in a new tab)x_refsource_CONFIRMx_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
• https://security.netapp.com/advisory/ntap-20171004-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://packetstormsecurity.com/files/134137/Slackware-Security-Advisory-ntp-Updates.html (opens in a new tab)x_refsource_MISCx_transferred
• openSUSE-SU-2016:1329 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20151021 Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015 (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
• SUSE-SU-2016:1471 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• https://bto.bluecoat.com/security-advisory/sa103 (opens in a new tab)x_refsource_CONFIRMx_transferred
• SUSE-SU-2016:1291 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• SUSE-SU-2016:1568 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• openSUSE-SU-2015:2016 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• SUSE-SU-2016:1278 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20151029 [slackware-security] ntp (SSA:2015-302-03) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20151029 [slackware-security] ntp (SSA:2015-302-03) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20151022 Cisco Security Advisory: Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 20151022 Cisco Security Advisory: Multiple Vulnerabilities in ntpd Affecting Cisco Products - October 2015 (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_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/1212-security-advisory-0016 (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, 07:58 UTC.