Microsoft Windows 10 20H2 up to Server 2004 DWM Core Library Remote Privilege Escalation

EntryeditHistoryDiffjsonxmlCTI
CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.0$0-$5k0.57

A vulnerability, which was classified as very critical, was found in Microsoft Windows 10 20H2 up to Server 2004 (Operating System). Affected is an unknown functionality of the component DWM Core Library. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 06/08/2021 as confirmed security guidance (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is traded as CVE-2021-33739 since 05/28/2021. The exploitability is told to be easy. It is possible to launch the attack remotely. The successful exploitation needs a authentication. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/11/2021).

A public exploit has been developed by mavillon1 in C++ and been published 15 hours after the advisory. It is declared as functional. The exploit is shared for download at github.com. As 0-day the estimated underground price was around $100k and more.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 8.4
Vendor Vector (Microsoft): 🔒

CVSSv2infoedit

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

Exploitinginfoedit

Class: Unknown
CWE: Unknown
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Functional
Author: mavillon1
Programming Language: 🔒
Download: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

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

Patch: portal.msrc.microsoft.com

Timelineinfoedit

05/28/2021 CVE assigned
06/08/2021 +11 days Advisory disclosed
06/08/2021 +0 days Countermeasure disclosed
06/09/2021 +0 days Exploit disclosed
06/09/2021 +0 days VulDB entry created
06/11/2021 +2 days VulDB last update

Sourcesinfoedit

Vendor: https://www.microsoft.com/
Product: https://www.microsoft.com/en-us/windows

Advisory: portal.msrc.microsoft.com
Status: Confirmed

CVE: CVE-2021-33739 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161215

Entryinfoedit

Created: 06/09/2021 07:38 AM
Updated: 06/11/2021 08:51 AM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍
Committer: misc

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