ntpd up to 4.2.8p8 Broadcast Mode Replay Prevention resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability was found in ntpd up to 4.2.8p8. It has been declared as problematic. This vulnerability affects unknown code of the component Broadcast Mode Replay Prevention. Such manipulation leads to resource consumption. This vulnerability is listed as CVE-2016-7427. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in ntpd up to 4.2.8p8 (Network Management Software). It has been rated as problematic. Affected by this issue is some unknown processing of the component Broadcast Mode Replay Prevention. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.

The bug was discovered 11/21/2016. The weakness was presented 01/13/2017 by Matt with Cisco (Website). The advisory is available at nwtime.org. This vulnerability is handled as CVE-2016-7427 since 09/09/2016. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 28 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95986 (SUSE SLES11 Security Update : ntp (SUSE-SU-2016:3193-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371402 (Cisco UCS 6200 Series Fabric Interconnects Multiple Vulnerabilities in Network Time Protocol Daemon (CSCvc23476)).

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 databases at Tenable (95986) and SecurityFocus (BID 94447†). See VDB-93745, VDB-95317, VDB-95319 and VDB-95320 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

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

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95986
Nessus Name: SUSE SLES11 Security Update : ntp (SUSE-SU-2016:3193-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800407
OpenVAS Name: NTP.org ntp Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ntpd 4.2.8p9

Timelineinfo

09/09/2016 🔍
11/21/2016 +73 days 🔍
11/21/2016 +0 days 🔍
12/19/2016 +28 days 🔍
12/21/2016 +2 days 🔍
01/13/2017 +23 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
02/01/2025 +2939 days 🔍

Sourcesinfo

Advisory: USN-3707-2
Researcher: Matt
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7427 (🔍)
GCVE (CVE): GCVE-0-2016-7427
GCVE (VulDB): GCVE-100-95318

OVAL: 🔍

CERT: 🔍
SecurityFocus: 94447 - NTP CVE-2016-7427 Denial of Service Vulnerability
OSVDB: - CVE-2016-7427 - NTP - Denial of Service Issue
SecurityTracker: 1037354

See also: 🔍

Entryinfo

Created: 01/15/2017 10:37
Updated: 02/01/2025 18:59
Changes: 01/15/2017 10:37 (74), 07/21/2020 16:36 (9), 10/28/2022 16:11 (4), 02/01/2025 18:59 (15)
Complete: 🔍
Cache ID: 216:F3C:103

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