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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6.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2. It has been classified as critical. The impacted element is an unknown function of the component Win32k. Performing a manipulation results in access control. This vulnerability is known as CVE-2018-8120. Attacking locally is a requirement. Furthermore, an exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 (Operating System). It has been classified as critical. This affects an unknown code block of the component Win32k. The manipulation with an unknown input 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.

The bug was discovered 05/08/2018. The weakness was published 05/08/2018 by malware as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is uniquely identified as CVE-2018-8120 since 03/14/2018. The exploitability is told to be difficult. An attack has to be approached locally. The requirement for exploitation is a authentication. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue. 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 exploit is shared for download at exploit-db.com. It is declared as attacked. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 109651 (Security Updates for Windows Server 2008 (May 2018)), 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 91447 (Microsoft Windows Security Update May 2018). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/15/2022 with a due date of 04/05/2022:

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 Exploit-DB (45653), Zero-Day.cz (496), Tenable (109651) and SecurityFocus (BID 104034†). Similar entries are available at VDB-114536, VDB-117442, VDB-117443 and VDB-117444. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

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: 7.0
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

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

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109651
Nessus Name: Security Updates for Windows Server 2008 (May 2018)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860451
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (KB4103718)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms18_8120_win32k_privesc.rb
MetaSploit Name: Windows SetImeInfoEx Win32k NULL Pointer Dereference
MetaSploit File: 🔍

Exploit-DB: 🔍
Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

03/14/2018 🔍
05/08/2018 +55 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/08/2018 +0 days 🔍
05/09/2018 +0 days 🔍
05/09/2018 +0 days 🔍
05/09/2018 +0 days 🔍
02/07/2025 +2466 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: malware
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-8120 (🔍)
GCVE (CVE): GCVE-0-2018-8120
GCVE (VulDB): GCVE-100-117465

OVAL: 🔍

SecurityFocus: 104034 - Microsoft Windows Kernel 'Win32k.sys' CVE-2018-8120 Local Privilege Escalation Vulnerability
SecurityTracker: 1040849

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

Entryinfo

Created: 05/09/2018 14:16
Updated: 02/07/2025 18:58
Changes: 05/09/2018 14:16 (88), 02/03/2020 10:23 (12), 03/11/2023 08:32 (5), 04/24/2024 06:18 (22), 07/05/2024 08:40 (2), 09/09/2024 22:29 (2), 02/07/2025 18:58 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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