Microsoft Windows up to Server 2016 Kernel information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Microsoft Windows up to Server 2016. This issue affects some unknown processing of the component Kernel. Executing a manipulation can lead to information disclosure. This vulnerability is handled as CVE-2017-8491. It is possible to launch the attack on the local host. Additionally, an exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows up to Server 2016 (Operating System). It has been declared as problematic. This vulnerability affects an unknown code block of the component Kernel. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality.

The bug was discovered 06/13/2017. The weakness was released 06/13/2017 by Mateusz Jurczyk with Google Project Zero as KB4022724 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability was named CVE-2017-8491 since 05/03/2017. The attack needs to be approached locally. The requirement for exploitation is a single authentication. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1592. The advisory points out:

An information disclosure vulnerability exists when the Windows kernel improperly initializes objects in memory. To exploit this vulnerability, an authenticated attacker could run a specially crafted application. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. The update addresses the vulnerability by correcting how the Windows kernel initializes objects in memory.

A public exploit has been developed by Google Security Research in C++ and been published 2 weeks after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 100759 (KB4022714: Windows 10 Version 1511 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91385 (Microsoft Windows Security Update June 2017).

Applying the patch KB4022724 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 Exploit-DB (42215), Tenable (100759) and SecurityFocus (BID 98869†). Entries connected to this vulnerability are available at VDB-102373, VDB-102374, VDB-102375 and VDB-102376. 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: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.5
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.7
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100759
Nessus Name: KB4022714: Windows 10 Version 1511 June 2017 Cumulative Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802136
OpenVAS Name: Microsoft Windows Multiple Vulnerabilites (KB4022719)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: KB4022724

Timelineinfo

05/03/2017 🔍
06/13/2017 +41 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 🔍
06/21/2017 +7 days 🔍
06/21/2017 +0 days 🔍
08/20/2024 +2617 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: KB4022724
Researcher: Mateusz Jurczyk
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-8491 (🔍)
GCVE (CVE): GCVE-0-2017-8491
GCVE (VulDB): GCVE-100-102436

OVAL: 🔍

SecurityFocus: 98869 - Microsoft Windows Kernel CVE-2017-8491 Local Information Disclosure Vulnerability
SecurityTracker: 1038659

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

Entryinfo

Created: 06/14/2017 11:28
Updated: 08/20/2024 02:22
Changes: 06/14/2017 11:28 (96), 10/19/2019 17:41 (7), 12/28/2020 10:25 (3), 08/20/2024 02:22 (17)
Complete: 🔍
Cache ID: 216::103

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