Microsoft Windows up to Server 2016 Hyper-V input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft Windows up to Server 2016. The impacted element is an unknown function of the component Hyper-V. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2017-8714. The attack must be initiated from a local position. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows up to Server 2016 (Operating System). This affects an unknown code of the component Hyper-V. 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. The summary by CVE is:

The Windows Hyper-V component on Microsoft Windows 8.1, Windows Server 2012 Gold and R2,, Windows 10 1607, and Windows Server 2016 allows a remote code execution vulnerability when it fails to properly validate input from an authenticated user on a guest operating system, aka "Remote Desktop Virtual Host Remote Code Execution Vulnerability".

The bug was discovered 09/12/2017. The weakness was shared 09/12/2017 as KB4038782 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2017-8714 since 05/03/2017. The exploitability is told to be difficult. An attack has to be approached locally. A authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/12/2021). The advisory points out:

A remote code execution vulnerability exists in the VM Host Agent Service of Remote Desktop Virtual Host role when it fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could issue a specially crafted certificate on the guest operating system that could cause the VM host agent service on the host operating system to execute arbitrary code. The Remote Desktop Virtual Host role is not enabled by default.

The vulnerability scanner Nessus provides a plugin with the ID 99532 (Amazon Linux AMI : R (ALAS-2017-819)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350984 (Amazon Linux Security Advisory for R: ALAS-2017-819).

Applying the patch KB4038782 is able to eliminate this problem. The bugfix is ready for download at catalog.update.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99532) and SecurityFocus (BID 100797†). The entries VDB-106500, VDB-106506, VDB-106507 and VDB-106508 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.8
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99532
Nessus Name: Amazon Linux AMI : R (ALAS-2017-819)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Server 2012 Multiple Vulnerabilities (KB4038799)
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: 🔍

Patch: KB4038782

Timelineinfo

04/21/2017 🔍
05/03/2017 +12 days 🔍
09/12/2017 +132 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/12/2017 +0 days 🔍
09/13/2017 +1 days 🔍
01/12/2021 +1217 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4038782
Researcher: Jared S. Candelaria.
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8714 (🔍)
GCVE (CVE): GCVE-0-2017-8714
GCVE (VulDB): GCVE-100-106509

OVAL: 🔍

SecurityFocus: 100797 - Microsoft Remote Desktop Virtual Host CVE-2017-8714 Remote Code Execution Vulnerability
SecurityTracker: 1039341

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

Entryinfo

Created: 09/13/2017 11:26
Updated: 01/12/2021 09:19
Changes: 09/13/2017 11:26 (90), 06/06/2020 10:36 (5), 01/12/2021 09:13 (3), 01/12/2021 09:19 (1)
Complete: 🔍
Cache ID: 216::103

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