Samba up to 4.4.15/4.5.12/4.6.7 Signing 7pk security

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
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A vulnerability classified as critical was found in Samba up to 4.4.15/4.5.12/4.6.7 (File Transfer Software). This vulnerability affects some unknown functionality of the component Signing Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 09/21/2017. The weakness was shared 09/21/2017 by Stefan Metzmacher as confirmed advisory (Website). The advisory is available at This vulnerability was named CVE-2017-12150 since 08/01/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1211 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 103408 (RHEL 6 : samba4 (RHSA-2017:2791)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157562 (Oracle Enterprise Linux Security Update for samba (ELSA-2017-2789)).

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

The vulnerability is also documented in the databases at SecurityFocus (BID 100918), SecurityTracker (ID 1039401) and Tenable (103408). The entries 107075 and 107076 are related to this item.




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: Privilege escalation
CWE: CWE-254
ATT&CK: T1211

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 103408
Nessus Name: RHEL 6 : samba4 (RHSA-2017:2791)
Nessus File: 🔍
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OpenVAS ID: 53754
OpenVAS Name: Debian Security Advisory DSA 3983-1 (samba - security update)
OpenVAS File: 🔍
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Qualys Name: 🔍

Threat Intelligenceinfoedit

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Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

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 🔍
09/21/2017 +0 days 🔍
09/22/2017 +1 days 🔍
09/25/2017 +3 days 🔍
07/26/2018 +303 days 🔍
01/14/2021 +903 days 🔍



Researcher: Stefan Metzmacher
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-12150 (🔍)

SecurityFocus: 100918 - Samba CVE-2017-12150 Man in the Middle Security Bypass Vulnerability
SecurityTracker: 1039401

See also: 🔍


Created: 09/25/2017 11:06 AM
Updated: 01/14/2021 11:19 AM
Changes: (1) source_cve_cna
Complete: 🔍


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