ntp 4.2.8p5 Broadcast 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in ntp 4.2.8p5 and classified as critical. This vulnerability affects unknown code of the component Broadcast Handler. Executing a manipulation can lead to 7pk security. The identification of this vulnerability is CVE-2015-7973. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in ntp 4.2.8p5 (Network Management Software) and classified as critical. This vulnerability affects an unknown code of the component Broadcast Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect integrity, and availability. CVE summarizes:

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.

The weakness was shared 01/19/2016 with Boston University as confirmed security notice (Website). The advisory is shared for download at support.ntp.org. This vulnerability was named CVE-2015-7973 since 10/23/2015. The exploitation appears to be easy. The attack needs to be initiated within the local network. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability scanner Nessus provides a plugin with the ID 88054 (Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p6 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168876 (OpenSuSE Security Update for ntp (openSUSE-SU-2016:1423-1)).

Upgrading to version 4.2.8p6 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (110018), Tenable (88054), SecurityFocus (BID 81963†) and Vulnerability Center (SBV-56269†). The entries VDB-80645, VDB-80646, VDB-80647 and VDB-80648 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.8
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 88054
Nessus Name: Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p6 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 864076
OpenVAS Name: NTP.org ntpd Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ntp 4.2.8p6

Timelineinfo

10/23/2015 🔍
01/19/2016 +88 days 🔍
01/19/2016 +0 days 🔍
01/19/2016 +0 days 🔍
01/21/2016 +2 days 🔍
01/25/2016 +4 days 🔍
01/27/2016 +2 days 🔍
01/29/2016 +2 days 🔍
01/30/2017 +367 days 🔍
05/17/2026 +3393 days 🔍

Sourcesinfo

Advisory: USN-3096-1
Organization: Boston University
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-7973 (🔍)
GCVE (CVE): GCVE-0-2015-7973
GCVE (VulDB): GCVE-100-80644

OVAL: 🔍

X-Force: 110018 - NTP broadcast mode packets replay attack
SecurityFocus: 81963 - NTP CVE-2015-7973 Security Bypass Vulnerability
SecurityTracker: 1034782
Vulnerability Center: 56269 - [cisco-sa-20160127-ntpd] Cisco Multiple Products Remote DoS and Security Bypass due to an Issue in NTP Server - CVE-2015-7973, High

See also: 🔍

Entryinfo

Created: 01/25/2016 13:48
Updated: 05/17/2026 01:03
Changes: 01/25/2016 13:48 (70), 07/22/2018 10:22 (20), 07/06/2022 08:30 (4), 05/17/2026 01:03 (15)
Complete: 🔍
Cache ID: 216::103

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