ntpd up to 4.2.8p8 Origin Timestamp Protection input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in ntpd up to 4.2.8p8. The affected element is an unknown function of the component Origin Timestamp Protection. The manipulation leads to input validation. This vulnerability is documented as CVE-2016-7431. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ntpd up to 4.2.8p8 (Network Management Software). This issue affects some unknown functionality of the component Origin Timestamp Protection. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

NTP before 4.2.8p9 allows remote attackers to bypass the origin timestamp protection mechanism via an origin timestamp of zero. NOTE: this vulnerability exists because of a CVE-2015-8138 regression.

The bug was discovered 11/21/2016. The weakness was released 01/13/2017 with Boston University (Website). The advisory is shared at nwtime.org. The identification of this vulnerability is CVE-2016-7431 since 09/09/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

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 94454†). Entries connected to this vulnerability are available at VDB-93745, VDB-95317, VDB-95318 and VDB-95319. If you want to get the best quality for vulnerability data then you always have to consider 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: 6.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 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 Zero Origin Timestamp Regression Vulnerability
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 🔍
01/27/2025 +2934 days 🔍

Sourcesinfo

Advisory: USN-3349-1
Organization: Boston University
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7431 (🔍)
GCVE (CVE): GCVE-0-2016-7431
GCVE (VulDB): GCVE-100-95321

OVAL: 🔍

CERT: 🔍
SecurityFocus: 94454 - NTP CVE-2016-7431 Denial of Service Vulnerability
OSVDB: - CVE-2016-7431 - NTP - Security Bypass Issue
SecurityTracker: 1037354

See also: 🔍

Entryinfo

Created: 01/15/2017 10:37
Updated: 01/27/2025 05:55
Changes: 01/15/2017 10:37 (74), 07/21/2020 16:48 (8), 10/28/2022 16:42 (4), 01/27/2025 05:55 (15)
Complete: 🔍
Cache ID: 216:E8E:103

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