Samba up to 4.4.15/4.5.12/4.6.7 DFS cryptographic issues

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Samba up to 4.4.15/4.5.12/4.6.7 (File Transfer Software). This issue affects an unknown part of the component DFS. The manipulation with an unknown input leads to a weak encryption vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability.

The bug was discovered 09/21/2017. The weakness was published 09/21/2017 by Stefan Metzmacher as confirmed advisory (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2017-12151 since 08/01/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 103801 (openSUSE Security Update : samba (openSUSE-2017-1147)), 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 local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236503 (Red Hat Update for samba (RHSA-2017:2790)).

Upgrading to version 4.4.16, 4.5.14 or 4.6.8 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 100917), SecurityTracker (ID 1039401) and Tenable (103801). Similar entries are available at 107074 and 107076.




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
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Class: Weak encryption
CWE: CWE-310
ATT&CK: T1600

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 103801
Nessus Name: openSUSE Security Update : samba (openSUSE-2017-1147)
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OpenVAS ID: 53754
OpenVAS Name: Debian Security Advisory DSA 3983-1 (samba - security update)
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Threat Intelligenceinfoedit

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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Upgrade: Samba 4.4.16/4.5.14/4.6.8


08/01/2017 🔍
09/20/2017 +50 days 🔍
09/21/2017 +1 days 🔍
09/21/2017 +0 days 🔍
09/21/2017 +0 days 🔍
09/25/2017 +4 days 🔍
10/11/2017 +16 days 🔍
10/12/2017 +1 days 🔍
07/27/2018 +287 days 🔍
01/14/2021 +902 days 🔍



Researcher: Stefan Metzmacher
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-12151 (🔍)

SecurityFocus: 100917 - Samba CVE-2017-12151 Man in the Middle Security Bypass Vulnerability
SecurityTracker: 1039401

See also: 🔍


Created: 09/25/2017 11:06 AM
Updated: 01/14/2021 11:30 AM
Changes: (1) source_cve_cna
Complete: 🔍


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