ntp 4.2.8 unconfig Directive input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in ntp 4.2.8. This affects an unknown part of the component unconfig Directive Handler. The manipulation results in input validation. This vulnerability is identified as CVE-2016-2516. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ntp 4.2.8 (Network Management Software). It has been classified as critical. Affected is an unknown functionality of the component unconfig Directive Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on integrity, and availability. CVE summarizes:

NTP before 4.2.8p7 and 4.3.x before 4.3.92, when mode7 is enabled, allows remote attackers to cause a denial of service (ntpd abort) by using the same IP address multiple times in an unconfig directive.

The weakness was released 04/27/2016 by Security Team with Qihoo 360 as confirmed security notice (Website). The advisory is available at support.ntp.org. This vulnerability is traded as CVE-2016-2516 since 02/20/2016. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 90977 (Fedora 24 : ntp-4.2.6p5-40.fc24 (2016-ed8c6c0426)), 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 316362 (Cisco UCS 6200 Series Fabric Interconnects Multiple Vulnerabilities in Network Time Protocol Daemon (CSCuz44156)).

Upgrading to version 4.2.8p7 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (112744), Tenable (90977) and SecurityFocus (BID 88180†). Entries connected to this vulnerability are available at VDB-78854, VDB-80651, VDB-82981 and VDB-82982. 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: 6.3
VulDB Meta Temp Score: 5.8

VulDB Base Score: 7.2
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: 90977
Nessus Name: Fedora 24 : ntp-4.2.6p5-40.fc24 (2016-ed8c6c0426)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 862576
OpenVAS Name: SuSE Update for ntp SUSE-SU-2016:1568-1 (ntp)
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 4.2.8p7

Timelineinfo

02/20/2016 🔍
04/26/2016 +65 days 🔍
04/27/2016 +1 days 🔍
04/28/2016 +1 days 🔍
05/07/2016 +8 days 🔍
05/09/2016 +2 days 🔍
01/30/2017 +266 days 🔍
07/27/2022 +2004 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-ed8c6c0426
Researcher: Security Team
Organization: Qihoo 360
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2516 (🔍)
GCVE (CVE): GCVE-0-2016-2516
GCVE (VulDB): GCVE-100-82986

OVAL: 🔍

CERT: 🔍
X-Force: 112744 - NTP unconfig directives denial of service
SecurityFocus: 88180 - NTP CVE-2016-2516 Denial of Service Vulnerability
SecurityTracker: 1035705

See also: 🔍

Entryinfo

Created: 04/28/2016 10:47
Updated: 07/27/2022 09:44
Changes: 04/28/2016 10:47 (68), 10/29/2018 06:15 (20), 07/27/2022 09:42 (4), 07/27/2022 09:44 (1)
Complete: 🔍
Cache ID: 216::103

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