Microsoft .NET Framework up to 4.7.2 CORS Filter information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability was found in Microsoft .NET Framework up to 4.7.2 (Programming Language Software). It has been declared as problematic. This vulnerability affects an unknown code of the component CORS Filter. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality.

The bug was discovered 01/08/2019. The weakness was shared 01/08/2019 with Microsoft as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The vendor cooperated in the coordination of the public release. This vulnerability was named CVE-2019-0545 since 11/26/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project. The advisory points out:

An information disclosure vulnerability exists in .NET Framework and .NET Core which allows bypassing Cross-origin Resource Sharing (CORS) configurations.

The vulnerability scanner Nessus provides a plugin with the ID 121011 (KB4480116: Windows 10 Version 1809 and Windows Server 2019 January 2019 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 371584 (PowerShell Core Multiple .NET Vulnerabilities).

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 (121011). The entries 126755, 128717, 128718 and 128719 are related to this item.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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CVSSv2info

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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
ATT&CK: T1592

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 121011
Nessus Name: KB4480116: Windows 10 Version 1809 and Windows Server 2019 January 2019 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Timelineinfo

11/26/2018 🔍
01/08/2019 +43 days 🔍
01/08/2019 +0 days 🔍
01/08/2019 +0 days 🔍
01/08/2019 +0 days 🔍
01/08/2019 +0 days 🔍
01/08/2019 +0 days 🔍
01/08/2019 +0 days 🔍
06/23/2023 +1627 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: RHSA-2019:0040
Organization: Microsoft
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2019-0545 (🔍)
SecurityFocus: 106405 - Microsoft ASP.NET Core CVE-2019-0545 Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 01/08/2019 10:15 PM
Updated: 06/23/2023 09:30 AM
Changes: 01/08/2019 10:15 PM (76), 04/26/2020 02:15 PM (6), 06/23/2023 09:30 AM (5)
Complete: 🔍

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