Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 Win32k access control

CVSS Meta Temp Score
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CTI Interest Score
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7.7$5k-$25k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2. This impacts an unknown function of the component Win32k. This manipulation causes access control. This vulnerability is handled as CVE-2018-8589. It is possible to launch the attack on the local host. Additionally, an exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 (Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component Win32k. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka "Windows Win32k Elevation of Privilege Vulnerability." This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.

The bug was discovered 11/13/2018. The weakness was released 11/13/2018 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is known as CVE-2018-8589 since 03/14/2018. Attacking locally is a requirement. A single authentication is required for exploitation. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/07/2025). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 118913 (KB4467106: Windows 7 and Windows Server 2008 R2 November 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 91481 (Microsoft Windows Security Update November 2018). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 05/23/2022 with a due date of 06/13/2022:

Apply updates per vendor instructions.

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 Zero-Day.cz (522), Tenable (118913) and SecurityFocus (BID 105796†). Entries connected to this vulnerability are available at VDB-126712, VDB-126713, VDB-126714 and VDB-126719. Be aware that VulDB is the high quality 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: 7.8
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: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
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KEV Added: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118913
Nessus Name: KB4467106: Windows 7 and Windows Server 2008 R2 November 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Zero-Day.cz: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

03/14/2018 🔍
11/13/2018 +244 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/13/2018 +0 days 🔍
11/14/2018 +1 days 🔍
02/07/2025 +2277 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

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

CVE: CVE-2018-8589 (🔍)
GCVE (CVE): GCVE-0-2018-8589
GCVE (VulDB): GCVE-100-126751

OVAL: 🔍

SecurityFocus: 105796 - Microsoft Windows Kernel 'Win32k.sys' CVE-2018-8589 Local Privilege Escalation Vulnerability
SecurityTracker: 1042140

scip Labs: https://www.scip.ch/en/?labs.20140213
See also: 🔍

Entryinfo

Created: 11/14/2018 09:54
Updated: 02/07/2025 18:58
Changes: 11/14/2018 09:54 (88), 04/12/2020 11:26 (5), 06/06/2023 09:10 (4), 04/26/2024 07:01 (25), 07/04/2024 17:38 (2), 09/09/2024 22:30 (1), 02/07/2025 18:58 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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