CVE-2015-7849

Name: CVE-2015-7849
Creator: NVD / NIST
Published: 2017-08-07T20:29:00.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 16.85%

Last modified Jun 17, 2026

CVE-2015-7849 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Use-after-free vulnerability in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to possibly execute arbitrary code or cause a denial of service (crash) via crafted packets.. EPSS estimates a 16.85% chance of exploitation in the next 30 days.

Description

Use-after-free vulnerability in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote authenticated users to possibly execute arbitrary code or cause a denial of service (crash) via crafted packets.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

16.85%

96.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Ntp	Ntp	>= 4.2.0, < 4.2.8
Ntp	Ntp	>= 4.3.0, < 4.3.77
Ntp	Ntp	4.2.8
Netapp	Oncommand Balance	All versions
Netapp	Oncommand Performance Manager	All versions
Netapp	Oncommand Unified Manager	All versions
Netapp	Clustered Data Ontap	All versions
Netapp	Data Ontap	All versions

References

http://support.ntp.org/bin/view/Main/NtpBug2916Patch, Vendor Advisory
http://www.securityfocus.com/bid/77276Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033951Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1274257Issue Tracking, Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201607-15Third Party Advisory, VDB Entry
https://security.netapp.com/advisory/ntap-20171004-0001/Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug2916Patch, Vendor Advisory
http://www.securityfocus.com/bid/77276Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033951Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1274257Issue Tracking, Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201607-15Third Party Advisory, VDB Entry
https://security.netapp.com/advisory/ntap-20171004-0001/Third Party Advisory

Timeline

Published: Aug 7, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-7849?

How severe is CVE-2015-7849?

CVE-2015-7849 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 16.85% probability of exploitation in the next 30 days.

How do I fix CVE-2015-7849?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-7849?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST