Microsoft Windows 10 1703 Subsystem for Linux NT Pipe access control

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Microsoft Windows 10 1703. The affected element is an unknown function of the component Subsystem for Linux. The manipulation as part of NT Pipe results in access control. This vulnerability is reported as CVE-2017-8622. The attack requires a local approach. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Windows 10 1703 (Operating System). Affected is an unknown code block of the component Subsystem for Linux. The manipulation as part of a NT Pipe leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Windows Subsystem for Linux in Windows 10 1703 allows an elevation of privilege vulnerability when it fails to properly handle handles NT pipes, aka "Windows Subsystem for Linux Elevation of Privilege Vulnerability".

The bug was discovered 08/08/2017. The weakness was disclosed 08/08/2017 by Alex as KB4034674 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2017-8622 since 05/03/2017. The exploitability is told to be difficult. The attack needs to be approached locally. The requirement for exploitation is a authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/07/2021). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 102269 (KB4034674: Windows 10 Version 1703 August 2017 Cumulative 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 91405 (Microsoft Windows Security Update August 2017).

Applying the patch KB4034674 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 (102269) and SecurityFocus (BID 100040†). The entries VDB-102409, VDB-104989, VDB-104990 and VDB-104991 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: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.0
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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NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
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: 102269
Nessus Name: KB4034674: Windows 10 Version 1703 August 2017 Cumulative Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilites (KB4034674)
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: KB4034674

Timelineinfo

05/03/2017 🔍
08/08/2017 +97 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/09/2017 +1 days 🔍
01/07/2021 +1247 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4034674
Researcher: Alex Ionescu (Alex)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8622 (🔍)
GCVE (CVE): GCVE-0-2017-8622
GCVE (VulDB): GCVE-100-105012

OVAL: 🔍

SecurityFocus: 100040 - Microsoft Windows CVE-2017-8622 Local Privilege Escalation Vulnerability
SecurityTracker: 1039103

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

Entryinfo

Created: 08/09/2017 11:45
Updated: 01/07/2021 17:09
Changes: 08/09/2017 11:45 (90), 11/05/2019 06:09 (6), 01/07/2021 17:04 (2), 01/07/2021 17:09 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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