CVE-2018-8356 — .NET Framework Security Feature Bypass Vulnerability

Executive Summary

A security feature bypass vulnerability exists when Microsoft .NET Framework components do not correctly validate certificates. An attacker could present expired certificates when challenged. The security update addresses the vulnerability by ensuring that .NET Framework components correctly validate certificates.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Exploitation Unlikely

MS Exploit Likelihood

Category Security Feature Bypass

Released Jul 10 2018

Last Updated Jul 10 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

11 affected products

Product	KB Article	Severity	Impact	Restart Required
.NET Core 1.0	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
.NET Core 1.1	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
.NET Core 2.0	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
.NET Framework 4.7.2 Developer Pack	`Release Notes (Security Update)`	Important	Security Feature Bypass	No
ASP.NET Core 1.0	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
ASP.NET Core 1.1	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
ASP.NET Core 2.0	`Commit (Security Update)`	Important	Security Feature Bypass	Maybe
Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4338422 (Monthly Rollup) 4338611 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Yes Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 4338422 (Monthly Rollup) 4338611 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Yes Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 4338422 (Monthly Rollup) 4338611 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Yes Maybe None Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems 4338826 (Security Update) 4345419 (Alternate Cumulative) Important Security Feature Bypass 4284874 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems 4338826 (Security Update) 4345419 (Alternate Cumulative) Important Security Feature Bypass 4284874 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems 4338825 (Security Update) 4345420 (Alternate Cumulative) Important Security Feature Bypass 4284819 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems 4338825 (Security Update) 4345420 (Alternate Cumulative) Important Security Feature Bypass 4284819 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems 4338424 (Monthly Rollup) 4338613 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898868 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems 4338424 (Monthly Rollup) 4338613 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898868 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 4338421 (Monthly Rollup) 4338610 (Security Only) Important Security Feature Bypass 4099634; 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) 4338421 (Monthly Rollup) 4338610 (Security Only) Important Security Feature Bypass 4099634; 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 4338424 (Monthly Rollup) 4338613 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898868 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) 4338424 (Monthly Rollup) 4338613 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898868 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2016 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation) 4338825 (Security Update) 4345420 (Alternate Cumulative) Important Security Feature Bypass 4284819 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation) 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 4338423 (Monthly Rollup) 4338612 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5.1 on Windows 7 for x64-based Systems Service Pack 1 4338423 (Monthly Rollup) 4338612 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4338423 (Monthly Rollup) 4338612 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4338423 (Monthly Rollup) 4338612 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4338423 (Monthly Rollup) 4338612 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems 4338415 (Monthly Rollup) 4338600 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898871 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems 4338415 (Monthly Rollup) 4338600 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898871 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows RT 8.1	`4338415 (Monthly Rollup)`	Important	Security Feature Bypass	Maybe
Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4338417 (Monthly Rollup) 4338602 (Security Only) Important Security Feature Bypass 4099633, 4291493 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 4338416 (Monthly Rollup) 4338601 (Security Only) Important Security Feature Bypass 4099634; 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) 4338416 (Monthly Rollup) 4338601 (Security Only) Important Security Feature Bypass 4099634; 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 4338415 (Monthly Rollup) 4338600 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898871 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 (Server Core installation) 4338415 (Monthly Rollup) 4338600 (Security Only) Important Security Feature Bypass 4099635; 4291497 2898871 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) 4338814 (Security Update) 4345418 (Alternate Cumulative) Important Security Feature Bypass 4284880 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6/4.6.1/4.6.2 on Windows 10 for x64-based Systems 4338829 (Security Update) 4345455 (Alternate Cumulative) Important Security Feature Bypass 4284860 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems 4338419 (Monthly Rollup) 4338605 (Security Only) Important Security Feature Bypass 4099635; 4291497 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems 4338419 (Monthly Rollup) 4338605 (Security Only) Important Security Feature Bypass 4099635; 4291497 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1	`4338419 (Monthly Rollup)`	Important	Security Feature Bypass	Maybe
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4338420 (Monthly Rollup) 4338606 (Security Only) Important Security Feature Bypass 4099636, 4291501 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 4338418 (Monthly Rollup) 4338604 (Security Only) Important Security Feature Bypass 4099634, 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation) 4338418 (Monthly Rollup) 4338604 (Security Only) Important Security Feature Bypass 4099634, 4291495 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 4338419 (Monthly Rollup) 4338605 (Security Only) Important Security Feature Bypass 4099635; 4291497 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation) 4338419 (Monthly Rollup) 4338605 (Security Only) Important Security Feature Bypass 4099635; 4291497 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) 4338819 (Security Update) 4345421 (Alternate Cumulative) Important Security Feature Bypass 4284835 Base: N/A Temporal: N/A Vector: N/A Yes None PowerShell Core 6.0	`Release Notes (Security Update)`	Important	Security Feature Bypass	No
PowerShell Core 6.1	`Release Notes (Security Update)`	Important	Security Feature Bypass	No

Patches

4 patches

Article	Type	Restart
`Commit`	Security Update	Maybe
`Release Notes`	Security Update	No
`4338415`	Monthly Rollup	Maybe
`4338419`	Monthly Rollup	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

None

References

MSRC Advisory MITRE NVD