Samba 4.2.9/4.3.6/4.4.0 TLS Certificate cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in Samba 4.2.9/4.3.6/4.4.0 and classified as critical. The affected element is an unknown function of the component TLS Certificate Handler. Performing a manipulation results in cryptographic issue. This vulnerability is reported as CVE-2016-2113. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Samba 4.2.9/4.3.6/4.4.0 (File Transfer Software). This affects an unknown part of the component TLS Certificate Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not verify X.509 certificates from TLS servers, which allows man-in-the-middle attackers to spoof LDAPS and HTTPS servers and obtain sensitive information via a crafted certificate.

The weakness was disclosed 04/12/2016 (Website). It is possible to read the advisory at samba.org. This vulnerability is uniquely identified as CVE-2016-2113 since 01/29/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for 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 90519 (Fedora 23 : samba-4.3.8-0.fc23 (2016-be53260726) (Badlock)), 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 196447 (Ubuntu Security Notification for Samba Vulnerabilities (USN-2950-1) (BADLOCK)).

Upgrading to version 4.4.1, 4.3.7 or 4.2.10 eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (111940), Tenable (90519) and Vulnerability Center (SBV-58160†). The entries VDB-82210, VDB-82404, VDB-82405 and VDB-82406 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.4
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.4
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: Cryptographic issue
CWE: CWE-310
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: 90519
Nessus Name: Fedora 23 : samba-4.3.8-0.fc23 (2016-be53260726) (Badlock)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 850058
OpenVAS Name: CentOS Update for openchange CESA-2016:0612 centos6
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: Samba 4.4.1/4.3.7/4.2.10

Timelineinfo

01/29/2016 🔍
04/12/2016 +74 days 🔍
04/12/2016 +0 days 🔍
04/13/2016 +1 days 🔍
04/13/2016 +0 days 🔍
04/14/2016 +1 days 🔍
04/15/2016 +1 days 🔍
04/24/2016 +9 days 🔍
07/24/2022 +2282 days 🔍

Sourcesinfo

Product: samba.org

Advisory: FEDORA-2016-be53260726
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2113 (🔍)
GCVE (CVE): GCVE-0-2016-2113
GCVE (VulDB): GCVE-100-82407

OVAL: 🔍

X-Force: 111940 - Samba TLS certificate security bypass
SecurityTracker: 1035533
Vulnerability Center: 58160 - Samba 3.0.0 - 4.2.9, 4.3.0 - 4.3.6 and 4.4.0 Remote Man-in-the-Middle Attacks due to Missing TLS Certificate Validation, Medium

See also: 🔍

Entryinfo

Created: 04/15/2016 12:00
Updated: 07/24/2022 19:16
Changes: 04/15/2016 12:00 (75), 02/04/2019 14:28 (10), 07/24/2022 19:00 (5), 07/24/2022 19:08 (1), 07/24/2022 19:16 (1)
Complete: 🔍
Cache ID: 216:34A:103

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