Microsoft Windows up to Server 2019 lnk File type confusion

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CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$5k-$25k0.00

A vulnerability was found in Microsoft Windows (Operating System) and classified as critical. Affected by this issue is an unknown code block of the component lnk File Handler. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-843. Impacted is confidentiality, integrity, and availability.

The weakness was released 07/14/2020 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release was coordinated with the vendor. This vulnerability is handled as CVE-2020-1421 since 11/04/2019. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/30/2020). The advisory points out:

A remote code execution vulnerability exists in Microsoft Windows that could allow remote code execution if a .LNK file is processed.

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

Entries connected to this vulnerability are available at 157950, 157949, 157948 and 157947.

Productinfoedit

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CPE 2.3infoedit

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CVSSv3infoedit

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.5
Vendor Vector (Microsoft): 🔒

NVD Base Score: 8.8
NVD Vector: 🔒

CVSSv2infoedit

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Privilege escalation (CWE-843)
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Remediation: 🔍

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

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

Timelineinfoedit

11/04/2019 CVE assigned
07/14/2020 +253 days Advisory disclosed
07/14/2020 +0 days Countermeasure disclosed
07/15/2020 +1 days VulDB entry created
10/30/2020 +107 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
Coordinated: 🔒

CVE: CVE-2020-1421 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔒

Entryinfoedit

Created: 07/15/2020 10:26 AM
Updated: 10/30/2020 08:25 AM
Changes: (1) source_cve_assigned
Complete: 🔍

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