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mskbMicrosoftKB4506988
HistoryJul 09, 2019 - 7:00 a.m.

July 9, 2019 — KB4506988 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1709

2019-07-0907:00:00
Microsoft
support.microsoft.com
39

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.6 High

AI Score

Confidence

High

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.044 Low

EPSS

Percentile

92.2%

July 9, 2019 — KB4506988 Cumulative Update for .NET Framework 4.8 for Windows 10, version 1709

**Applies to:**Microsoft .NET Framework 4.8

Summary

A remote code execution vulnerability exists in .NET software if the software fails to check the source markup of a file. An Authentication Bypass vulnerability exists in WCF and WIF that enabloes SAML tokens to be signed by using arbitrary symmetric keys. This vulnerability enables an attacker to impersonate another user. The vulnerability exists in WCF, WIF 3.5 and later in .NET Framework, WIF 1.0 component in Windows, WIF Nuget package, and WIF implementation in SharePoint. An information disclosure vulnerability exists if Exchange and Azure Active Directory let entities be created even though they have Display Names that contain non-printable characters.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE):

Known issues in this update

Microsoft is not currently aware of any issues in this update.

How to get this update

Install this updateTo download and install this update, go toSettings,Update & Security,Windows Update, and then selectCheck for updates.This update will be downloaded and installed automatically from Windows Update.

To get the standalone package for this update, go to the Microsoft Update Catalog website.File informationFor a list of the files that are provided in this update, download the file information for cumulative update 4506988.

Information about protection and security

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.6 High

AI Score

Confidence

High

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.044 Low

EPSS

Percentile

92.2%