ntpd up to 4.2.8p8 Initial Sync Calculation calculation

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in ntpd up to 4.2.8p8. The impacted element is an unknown function of the component Initial Sync Calculation. The manipulation results in calculation. This vulnerability is reported as CVE-2016-7433. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in ntpd up to 4.2.8p8 (Network Management Software). Affected is an unknown part of the component Initial Sync Calculation. The manipulation with an unknown input leads to a calculation vulnerability. CWE is classifying the issue as CWE-682. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. This is going to have an impact on availability. CVE summarizes:

NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include the peer dispersion."

The bug was discovered 11/21/2016. The weakness was disclosed 01/13/2017 with Boston University (Website). The advisory is available at nwtime.org. This vulnerability is traded as CVE-2016-7433 since 09/09/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not 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 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 (95616) and SecurityFocus (BID 94455†). The entries VDB-93745, VDB-95317, VDB-95318 and VDB-95319 are pretty similar. 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: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Calculation
CWE: CWE-682
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: 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: 🔍

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 🔍
12/07/2016 +16 days 🔍
12/08/2016 +1 days 🔍
01/13/2017 +36 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
12/23/2024 +2899 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-e8a8561ee7
Organization: Boston University
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7433 (🔍)
GCVE (CVE): GCVE-0-2016-7433
GCVE (VulDB): GCVE-100-95322

OVAL: 🔍

CERT: 🔍
SecurityFocus: 94455 - NTP CVE-2016-7433 Local Denial of Service Vulnerability
OSVDB: - CVE-2016-7433 - NTP - Denial of Service Issue
SecurityTracker: 1037354

See also: 🔍

Entryinfo

Created: 01/15/2017 10:37
Updated: 12/23/2024 09:48
Changes: 01/15/2017 10:37 (75), 07/21/2020 16:50 (8), 10/28/2022 16:50 (4), 10/28/2022 16:57 (1), 10/28/2022 17:05 (1), 12/23/2024 09:48 (15)
Complete: 🔍
Cache ID: 216:9E7:103

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