Microsoft Windows 8.1 up to Server 2019 Early Launch Antimalware Driver unknown vulnerability

EntryeditHistoryDiffjsonxmlCTI
CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$5k-$25k0.00

A vulnerability classified as critical was found in Microsoft Windows (Operating System). Affected by this vulnerability is an unknown functionality of the component Early Launch Antimalware Driver. As an impact it is known to affect confidentiality, and availability. The summary by CVE is:

Windows Portmapping Information Disclosure Vulnerability

The weakness was presented 04/13/2021 as confirmed security guidance (Website). The advisory is shared at portal.msrc.microsoft.com. This vulnerability is known as CVE-2021-28446 since 03/15/2021. The exploitation appears to be easy. An attack has to be approached locally. The successful exploitation needs a single authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/16/2021).

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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CVSSv3infoedit

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.2

VulDB Base Score: 7.1
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.1
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: Yes
Remote: No

Availability: 🔒
Status: Unproven

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Patch: portal.msrc.microsoft.com

Timelineinfoedit

03/15/2021 CVE assigned
04/13/2021 +29 days VulDB entry created
04/13/2021 +0 days Advisory disclosed
04/13/2021 +0 days Countermeasure disclosed
04/16/2021 +3 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-2021-28446 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161215

Entryinfoedit

Created: 04/13/2021 10:07 PM
Updated: 04/16/2021 05:43 PM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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