.NET Framework
CVE-2018-0786 — .NET Security Feature Bypass Vulnerability
Important
2018-01 archive
Executive Summary
A security feature bypass vulnerability exists when Microsoft .NET Framework (and .NET Core) components do not completely validate certificates. An attacker could present a certificate that is marked invalid for a specific use, but the component uses it for that purpose. This action disregards the Enhanced Key Usage taggings. The security update addresses the vulnerability by helping to ensure that .NET Framework (and .NET Core) components completely validate certificates.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
31 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| .NET Core 1.0 | Commit (Security Update) |
Important | Security Feature Bypass | Yes |
| .NET Core 2.0 | Commit (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Update) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Update) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 4054996 (Monthly Rollup) 4054174 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122646 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems | 4056893 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems | 4056893 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1511 for 32-bit Systems | 4056888 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1511 for x64-based Systems | 4056888 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems | 4056891 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems | 4056891 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems 4054999 (Monthly Rollup) 4054177 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122651 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems 4054999 (Monthly Rollup) 4054182 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122660 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 4054997 (Monthly Rollup) 4054175 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122655, 3122658 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) 4054997 (Monthly Rollup) 4054175 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122655, 3122658 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 4054999 (Monthly Rollup) 4054177 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122651 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) 4054999 (Monthly Rollup) 4054177 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122651 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2016 | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation) | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 4054998 (Monthly Rollup) 4054176 (Security Only) Important Security Feature Bypass 4049016, 4041083 2973112, 3122648 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 4054998 (Monthly Rollup) 4054176 (Security Only) Important Security Feature Bypass 4049016, 4041083 2973112, 3122648 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 4054998 (Monthly Rollup) 4054176 (Security Only) Important Security Feature Bypass 4049016, 4041083 2973112, 3122648 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 4054998 (Monthly Rollup) 4054176 (Security Only) Important Security Feature Bypass 4049016, 4041083 2973112, 3122648 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) 4054998 (Monthly Rollup) 4054176 (Security Only) Important Security Feature Bypass 4049016, 4041083 2973112, 3122648 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 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122656 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 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122656 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 4054993 (Monthly Rollup) 4054170 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122654 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 4054993 (Monthly Rollup) 4054170 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122654 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows RT 8.1 | 4054993 (Monthly Rollup) |
Important | Security Feature Bypass | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049017, 4041086 3122656 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 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049017, 4041086 3122656 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 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122656 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) 4054995 (Monthly Rollup) 4054172 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122656 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 4054994 (Monthly Rollup) 4054171 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122655 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) 4054994 (Monthly Rollup) 4054171 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122655 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 4054993 (Monthly Rollup) 4054170 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122654 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) 4054993 (Monthly Rollup) 4054170 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122654 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6 on Windows 10 for 32-bit Systems | 4056893 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6 on Windows 10 for x64-based Systems | 4056893 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2 4055002 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122661 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 4055002 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4049019, 4041086 3122661 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for 32-bit Systems | 4056888 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for x64-based Systems | 4056888 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for 32-bit Systems | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for x64-based Systems | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016 | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016 (Server Core installation) | 4056890 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows 7 for 32-bit Systems Service Pack 1 4074880 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4041083; 4049016 3122661 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows 7 for x64-based Systems Service Pack 1 4074880 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122661 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows 8.1 for 32-bit systems 4055001 (Monthly Rollup) 4054182 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122660 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows 8.1 for x64-based systems 4055001 (Monthly Rollup) 4054182 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122660 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows RT 8.1 | 4055001 (Monthly Rollup) |
Important | Security Feature Bypass | Maybe |
| Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 4074880 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122661 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4074880 (Monthly Rollup) 4054183 (Security Only) Important Security Feature Bypass 4049016, 4041083 3122661 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2012 4055000 (Monthly Rollup) 4054181 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122658 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2012 (Server Core installation) 4055000 (Monthly Rollup) 4054181 (Security Only) Important Security Feature Bypass 4049018, 4041084 3122658 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2012 R2 4055001 (Monthly Rollup) 4054182 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122660 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7 on Windows Server 2012 R2 (Server Core installation) 4055001 (Monthly Rollup) 4054182 (Security Only) Important Security Feature Bypass 4049017, 4041085 3122660 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for 32-bit Systems | 4056891 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for x64-based Systems | 4056891 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.7.1 on Windows 10 Version 1709 for 32-bit Systems | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.7.1 on Windows 10 Version 1709 for x64-based Systems | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| Microsoft .NET Framework 4.7.1 on Windows Server, version 1709 (Server Core Installation) | 4056892 (Security Update) |
Important | Security Feature Bypass | Yes |
| PowerShell Core 6.0.0 | Release Notes (Security Update) |
Important | Security Feature Bypass | Maybe |
Patches
9 patches
| Article | Type | Restart |
|---|---|---|
Commit |
Security Update | Yes |
4056893 |
Security Update | Yes |
4056888 |
Security Update | Yes |
4056890 |
Security Update | Yes |
4056891 |
Security Update | Yes |
4056892 |
Security Update | Yes |
4054993 |
Monthly Rollup | Maybe |
4055001 |
Monthly Rollup | Maybe |
Release Notes |
Security Update | 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
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