CVE-2016-7426
Published Jan 13, 2017 · Updated Oct 23, 2026
Original summary
Normalized public record · Updated Oct 23, 2026
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.
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- 10%
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- h20566.www2.hpe.com ↗
- USN-3707-2 ↗
- RHSA-2017:0252 ↗
- support.ntp.org ↗
- nwtime.org ↗
- VU#633847 ↗
- 1037354 ↗
- bto.bluecoat.com ↗
- support.ntp.org ↗
- FreeBSD-SA-16:39 ↗
- 94451 ↗
Record history
Published Jan 13, 2017 · Last refreshed Oct 23, 2026