Home/CVE/NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is
CVE

CVE-2016-7426

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

HIGH · CVSS 7.5 EPSS 0.11683
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 6% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

3
ntp>= 4.2.6 and < 4.2.8
ntp>= 4.3.0 and < 4.3.94
ntpall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jan 2017 · 04:59 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:10181-1
usnUSN-3707-2
usnUSN-3349-1
suse-csafSUSE-SU-2017:0255-1
suse-csafSUSE-SU-2016:3193-1
🔗

References & Sources

11
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://nwtime.org/ntp428p9_release/Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0252.htmlThird Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug3071Issue TrackingMitigationVendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesRelease NotesVendor Advisory
http://www.securityfocus.com/bid/94451Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037354Third Party AdvisoryVDB Entry
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