.NET Framework
CVE-2018-8421 — .NET Framework Remote Code Execution Vulnerability
Critical
2018-09 archive
Executive Summary
A remote code execution vulnerability exists when Microsoft .NET Framework processes input. An attacker who successfully exploited this vulnerability could take control of an affected system. To exploit the vulnerability, an attacker would need to be able to upload a specially crafted file to a web application. The security update addresses the vulnerability by correcting how .NET Framework processes input.
Overview
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
28 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457043 (Monthly Rollup) 4457054 (Security Only) Critical Remote Code Execution 4345593, 4346083 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems | 4457132 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems | 4457132 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems | 4457138 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems | 4457138 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems 4457045 (Monthly Rollup) 4457056 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems 4457045 (Monthly Rollup) 4457056 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 4457042 (Monthly Rollup) 4457053 (Security Only) Critical Remote Code Execution 4345591, 4346081 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation) 4457042 (Monthly Rollup) 4457053 (Security Only) Critical Remote Code Execution 4345591, 4346081 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 4457045 (Monthly Rollup) 4457056 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation) 4457045 (Monthly Rollup) 4457056 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 3.5 on Windows Server 2016 | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation) | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation) | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation) | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1 4457044 (Monthly Rollup) 4457055 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457044 (Monthly Rollup) 4457055 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457044 (Monthly Rollup) 4457055 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457044 (Monthly Rollup) 4457055 (Security Only) Critical Remote Code Execution 4345590, 4346080 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) 4457044 (Monthly Rollup) 4457055 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457036 (Monthly Rollup) 4457028 (Security Only) Critical Remote Code Execution 4345592, 4346082 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 4457036 (Monthly Rollup) 4457028 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows RT 8.1 | 4457036 (Monthly Rollup) |
Critical | Remote Code Execution | Maybe |
| Microsoft .NET Framework 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 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 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 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) 4457038 (Monthly Rollup) 4457030 (Security Only) Critical Remote Code Execution 4345590, 4346080 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 4457037 (Monthly Rollup) 4457029 (Security Only) Critical Remote Code Execution 4345591, 4346081 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation) 4457037 (Monthly Rollup) 4457029 (Security Only) Critical Remote Code Execution 4345591, 4346081 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 4457036 (Monthly Rollup) 4457028 (Security Only) Critical Remote Code Execution 4345592, 4346082 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) 4457036 (Monthly Rollup) 4457028 (Security Only) Critical Remote Code Execution 4345592, 4346082 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 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation) | 4457131 (Security Update) |
Critical | Remote Code Execution | Yes |
| 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 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457034 (Monthly Rollup) 4457026 (Security Only) Critical Remote Code Execution 4345592, 4346082 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 4457034 (Monthly Rollup) 4457026 (Security Only) Critical Remote Code Execution 4345592, 4346082 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 | 4457034 (Monthly Rollup) |
Critical | Remote Code Execution | 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 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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) 4457035 (Monthly Rollup) 4457027 (Security Only) Critical Remote Code Execution 4345593, 4346083 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 4457033 (Monthly Rollup) 4457025 (Security Only) Critical Remote Code Execution 4345591, 4346081 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) 4457033 (Monthly Rollup) 4457025 (Security Only) Critical Remote Code Execution 4345591, 4346081 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 4457034 (Monthly Rollup) 4457026 (Security Only) Critical Remote Code Execution 4345592, 4346082 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) 4457034 (Monthly Rollup) 4457026 (Security Only) Critical Remote Code Execution 4345592, 4346082 Base: N/A Temporal: N/A Vector: N/A Maybe None Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation) | 4457142 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation) | 4457128 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit Systems | 4457138 (Security Update) |
Critical | Remote Code Execution | Yes |
| Microsoft .NET Framework 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based Systems | 4457138 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
7 patches
| Article | Type | Restart |
|---|---|---|
4457132 |
Security Update | Yes |
4457131 |
Security Update | Yes |
4457138 |
Security Update | Yes |
4457142 |
Security Update | Yes |
4457128 |
Security Update | Yes |
4457036 |
Monthly Rollup | Maybe |
4457034 |
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
References
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