Microsoft Windows 10/Server 2016 Default Folder access control

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Microsoft Windows 10/Server 2016 (Operating System). This affects some unknown functionality of the component Default Folder. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Microsoft Windows 10 1607 and 1703, and Windows Server 2016 allow an authenticated attacker to modify the C:\Users\DEFAULT folder structure, aka "Windows Default Folder Tampering Vulnerability".

The bug was discovered 06/13/2017. The weakness was published 06/13/2017 by Alex as KB4022715 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2017-0295 since 09/09/2016. An attack has to be approached locally. A authentication is required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:

A tampering vulnerability exists in Microsoft Windows that could allow an authenticated attacker to modify the C:\\Users\\DEFAULT folder structure. An attacker who successfully exploited this vulnerability could potentially modify files and folders that are synchronized the first time when a user logs in locally to the computer. To exploit this vulnerability, an attacker would need to log on to the affected system and tamper with the DEFAULT folder contents. An attacker can only exploit this vulnerability prior to a user logging on locally to the computer. Users who have logged on before the attacker attempts to exploit this vulnerability would not be affected. The security update addresses the vulnerability by correcting permissions on folders inside the DEFAULT folder structure.

The vulnerability scanner Nessus provides a plugin with the ID 100760 (KB4022715: Windows 10 Version 1607 and Windows Server 2016 June 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.

Applying the patch KB4022715 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 vulnerability database at Tenable (100760). Similar entries are available at 102374, 102378, 102379 and 102383.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.8
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100760
Nessus Name: KB4022715: Windows 10 Version 1607 and Windows Server 2016 June 2017 Cumulative Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilites (KB4022725)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: KB4022715

Timelineinfo

09/09/2016 🔍
06/13/2017 +277 days 🔍
06/13/2017 +0 days 🔍
06/13/2017 +0 days 🔍
06/13/2017 +0 days 🔍
06/13/2017 +0 days 🔍
06/14/2017 +1 days 🔍
06/14/2017 +0 days 🔍
12/28/2020 +1293 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4022715
Researcher: Client Operation, SOC (Alex)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-0295 (🔍)
OVAL: 🔍

SecurityTracker: 1038674
SecurityFocus: 98904 - Microsoft Windows CVE-2017-0295 Local Security Bypass Vulnerability

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

Entryinfo

Created: 06/14/2017 11:01
Updated: 12/28/2020 07:32
Changes: 06/14/2017 11:01 (87), 10/17/2019 11:31 (6), 12/28/2020 07:28 (2), 12/28/2020 07:32 (1)
Complete: 🔍

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