OpenNTPD up to 6.0 CN Validator 7pk security

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in OpenNTPD up to 6.0. This issue affects some unknown processing of the component CN Validator. This manipulation causes 7pk security. This vulnerability is handled as CVE-2016-5117. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenNTPD up to 6.0 (Network Management Software) and classified as critical. Affected by this vulnerability is an unknown code of the component CN Validator. 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 confidentiality, integrity, and availability. The summary by CVE is:

OpenNTPD before 6.0p1 does not validate the CN for HTTPS constraint requests, which allows remote attackers to bypass the man-in-the-middle mitigations via a crafted timestamp constraint with a valid certificate.

The bug was discovered 05/23/2016. The weakness was released 01/31/2017 (Website). It is possible to read the advisory at cvsweb.openbsd.org. This vulnerability is known as CVE-2016-5117 since 05/29/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 253 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 6.0p1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 5.9
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: 7pk security
CWE: CWE-254
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenNTPD 6.0p1

Timelineinfo

05/23/2016 🔍
05/29/2016 +6 days 🔍
01/31/2017 +247 days 🔍
01/31/2017 +0 days 🔍
02/01/2017 +1 days 🔍
08/08/2020 +1284 days 🔍

Sourcesinfo

Advisory: cvsweb.openbsd.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5117 (🔍)
GCVE (CVE): GCVE-0-2016-5117
GCVE (VulDB): GCVE-100-96331
OSVDB: - CVE-2016-5117 - OpenNTPD - Man-in-the-Middle Issue

Entryinfo

Created: 02/01/2017 07:14
Updated: 08/08/2020 12:21
Changes: 02/01/2017 07:14 (58), 08/08/2020 12:21 (4)
Complete: 🔍
Cache ID: 216:725:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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