Microsoft Windows up to Server 2016 Hyper-V vSMB input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Microsoft Windows up to Server 2016. This affects an unknown function of the component Hyper-V vSMB. The manipulation results in input validation. This vulnerability is cataloged as CVE-2018-0961. The attack must originate from the local network. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows up to Server 2016 (Operating System). Affected is an unknown code block of the component Hyper-V vSMB. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate vSMB packet data, aka "Hyper-V vSMB Remote Code Execution Vulnerability." This affects Windows Server 2016, Windows 10, Windows 10 Servers.

The bug was discovered 05/08/2018. The weakness was shared 05/08/2018 with Microsoft as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2018-0961 since 12/01/2017. The exploitability is told to be difficult. Access to the local network is required for this attack. Additional levels of successful authentication are needed for exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate vSMB packet data. An attacker who successfully exploited these vulnerabilities could execute arbitrary code on a target operating system.

The vulnerability scanner Nessus provides a plugin with the ID 109611 (KB4103731: Windows 10 Version 1703 May 2018 Security Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91447 (Microsoft Windows Security Update May 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109611) and SecurityFocus (BID 104032†). The entries VDB-117442, VDB-117443, VDB-117445 and VDB-117446 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.1
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.6
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.6
NVD Vector: 🔍

CVSSv2info

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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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109611
Nessus Name: KB4103731: Windows 10 Version 1703 May 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53775
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (KB4103727)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

12/01/2017 🔍
05/08/2018 +158 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/09/2018 +0 days 🔍
05/09/2018 +0 days 🔍
03/08/2023 +1764 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Organization: Microsoft
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0961 (🔍)
GCVE (CVE): GCVE-0-2018-0961
GCVE (VulDB): GCVE-100-117444

OVAL: 🔍

SecurityFocus: 104032 - Microsoft Windows Hyper-V CVE-2018-0961 Remote Code Execution Vulnerability
SecurityTracker: 1040843

scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 05/09/2018 14:04
Updated: 03/08/2023 22:24
Changes: 05/09/2018 14:04 (86), 02/03/2020 08:50 (6), 03/08/2023 22:24 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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