VDB-95320 · CVE-2016-7429 · BID 94453

ntpd up to 4.2.8p8 Source source code

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in ntpd up to 4.2.8p8 (Network Management Software). This vulnerability affects an unknown functionality of the component Source Handler. The manipulation with an unknown input leads to a source code vulnerability. The CWE definition for the vulnerability is CWE-18. As an impact it is known to affect availability.

The bug was discovered 11/21/2016. The weakness was published 01/13/2017 by Miroslav Lichvar with Red Hat (Website). The advisory is shared for download at nwtime.org. This vulnerability was named CVE-2016-7429 since 09/09/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 16 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95616 (Fedora 23 : ntp (2016-e8a8561ee7)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 390164 (Oracle VM Server for x86 Security Update for ntp (OVMSA-2018-0290)).

Upgrading to version 4.2.8p9 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (95616). Similar entries are available at 11702, 93745, 95317 and 95318.





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.7
NVD Vector: 🔍



VulDB Base Score: 🔍
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NVD Base Score: 🔍


Class: Source code
CWE: CWE-18 / CWE-17
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 95616
Nessus Name: Fedora 23 : ntp (2016-e8a8561ee7)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841785
OpenVAS Name: Fedora Update for ntp FEDORA-2016-c198d15316
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ntpd 4.2.8p9


09/09/2016 🔍
11/21/2016 +73 days 🔍
11/21/2016 +0 days 🔍
12/07/2016 +16 days 🔍
12/08/2016 +1 days 🔍
01/13/2017 +36 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
10/28/2022 +2112 days 🔍


Advisory: FEDORA-2016-e8a8561ee7
Researcher: Miroslav Lichvar
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7429 (🔍)

SecurityTracker: 1037354
SecurityFocus: 94453 - NTP CVE-2016-7429 Local Denial of Service Vulnerability
OSVDB: - CVE-2016-7429 - NTP - Denial of Service Issue

See also: 🔍


Created: 01/15/2017 10:37 AM
Updated: 10/28/2022 04:34 PM
Changes: 01/15/2017 10:37 AM (74), 07/21/2020 04:43 PM (9), 10/28/2022 04:26 PM (3), 10/28/2022 04:34 PM (1)
Complete: 🔍


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