CVE-2015-7704
No exploitation reported by the sources we read.
- Published2017-08-07
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted "KOD" messages.
Timeline
dates in UTC- 2017-08-0720:29CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-7704?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-7704?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.5 | = 6.5 | no fix published | NVD |
| 6.6 | = 6.6 | no fix published | NVD |
| 6.7 | = 6.7 | no fix published | NVD |
| 7.1 | = 7.1 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.4 | = 7.4 | no fix published | NVD |
| 7.5 | = 7.5 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
| 7.7 | = 7.7 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.5 | = 6.5 | no fix published | NVD |
| 6.6 | = 6.6 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.4 | = 7.4 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
| 7.7 | = 7.7 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.5 | = 6.5 | no fix published | NVD |
| 6.6 | = 6.6 | no fix published | NVD |
| 7.3 | = 7.3 | no fix published | NVD |
| 7.6 | = 7.6 | no fix published | NVD |
| 7.7 | = 7.7 | no fix published | NVD |
11 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Siemens RUGGEDCOM ROX-based Devices NTP Vulnerabilities
Siemens RUGGEDCOM ROX I: vers:all/* · Siemens ROX II: <2.9.0
Fix
- Mitigation from the vendor CISA ICSA-15-356-01 · 2 productsUpdate to the latest version. (http://www.siemens.com/automation/support-request)
Advisories and patches
- bugs.ntp.orgVendor Advisory
- support.ntp.orgVendor Advisory
- support.ntp.orgRelease Notes · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.05read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score10.7 %read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2017-08-07
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2015-7704?
Is CVE-2015-7704 actively exploited?
What is the CVSS score for CVE-2015-7704?
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