Microsoft Windows up to Server 2019 Win32k access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.7$5k-$25k0.00

A vulnerability was found in Microsoft Windows (Operating System) and classified as critical. Affected by this issue is some unknown processing of the component Win32k. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The bug was discovered 10/09/2018. The weakness was released 10/09/2018 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated with the vendor. This vulnerability is handled as CVE-2018-8453 since 03/14/2018. The attack may be launched remotely. Required for exploitation is a simple authentication. 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 MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

The vulnerability scanner Nessus provides a plugin with the ID 117999 (KB4462919: Windows 10 Version 1803 and Windows Server Version 1803 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). This issue was added on 01/21/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 07/21/2022:

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 vulnerability database at Tenable (117999). Entries connected to this vulnerability are available at 125082, 125083, 125084 and 125089.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
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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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117999
Nessus Name: KB4462919: Windows 10 Version 1803 and Windows Server Version 1803 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: 153669
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-8453 (🔍)
OVAL: 🔍

SecurityTracker: 1041828
SecurityFocus: 105467 - Microsoft Windows Kernel 'Win32k.sys' CVE-2018-8453 Local Privilege Escalation Vulnerability

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

Entryinfo

Created: 10/10/2018 11:50
Updated: 05/23/2023 13:59
Changes: 10/10/2018 11:50 (87), 03/31/2020 20:44 (5), 05/23/2023 13:59 (6)
Complete: 🔍

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