CVE-2015-7973

6.5 MEDIUM 3% exploit odds Fix listed

What it is

NTP before 4.2.8p6 and 4.3.x before 4.3.90, when configured in broadcast mode, allows man-in-the-middle attackers to conduct replay attacks by sniffing the network.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 3.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2017-01-30 21:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:33 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.4% in the next 30 days (EPSS).
Severity: 6.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2017-01-30 21:59 UTC
Last modified: 2026-06-17 00:33 UTC
Exploit probability: 3.4% · EPSS, next 30 days
Weakness: CWE-254
Record status: Modified

Affected

Ntp < 4.2.8
Ntp < 4.3.90
Ntp 4.2.8
Siemens Tim 4r-ie Firmware
Siemens Tim 4r-ie dnp3 Firmware
Freebsd < 10.1
Freebsd 9.3
Freebsd 10.1

Attack profile CVSS 3.1 · 6.5

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2015-7973.md and follow it. Check whether this project is affected by CVE-2015-7973. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record