Microsoft Windows up to Server 2019 Hyper-V input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.2$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows up to Server 2019. Affected by this vulnerability is an unknown functionality of the component Hyper-V. Executing a manipulation can lead to input validation. This vulnerability is tracked as CVE-2018-8490. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical was found in Microsoft Windows up to Server 2019 (Operating System). This vulnerability affects some unknown functionality of the component Hyper-V. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 10/09/2018. The weakness was disclosed 10/09/2018 with Microsoft as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2018-8490 since 03/14/2018. The attack can be initiated remotely. A single authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 05/23/2023). The advisory points out:

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.

The vulnerability scanner Nessus provides a plugin with the ID 118000 (KB4462922: Windows 10 October 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 91474 (Microsoft Windows Security Update October 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 (118000) and SecurityFocus (BID 105480†). The entries VDB-125093, VDB-125096, VDB-125097 and VDB-125098 are pretty similar. 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: 8.4
VulDB Meta Temp Score: 8.2

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

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

NVD Base Score: 8.4
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: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118000
Nessus Name: KB4462922: Windows 10 October 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

03/14/2018 🔍
10/09/2018 +208 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/09/2018 +0 days 🔍
10/10/2018 +1 days 🔍
10/10/2018 +0 days 🔍
05/23/2023 +1686 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

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

CVE: CVE-2018-8490 (🔍)
GCVE (CVE): GCVE-0-2018-8490
GCVE (VulDB): GCVE-100-125092
SecurityFocus: 105480 - Microsoft Windows Hyper-V CVE-2018-8490 Remote Code Execution Vulnerability
SecurityTracker: 1041834

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

Entryinfo

Created: 10/10/2018 11:43
Updated: 05/23/2023 13:35
Changes: 10/10/2018 11:43 (84), 03/31/2020 20:25 (6), 05/23/2023 13:35 (5)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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