CVE-2018-8421: Input Validation
First published: Thu Sep 13 2018(Updated: )
A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input, aka ".NET Framework Remote Code Execution Vulnerability." This affects Microsoft .NET Framework 4.6, Microsoft .NET Framework 3.5, Microsoft .NET Framework 4.7/4.7.1/4.7.2, Microsoft .NET Framework 3.0, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.1/4.7.2, Microsoft .NET Framework 4.7.1/4.7.2, Microsoft .NET Framework 4.7.2, Microsoft .NET Framework 2.0.
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft .NET Framework 4 | =2.0-sp2 | |
| Microsoft .NET Framework 4 | =3.0-sp2 | |
| Microsoft Windows Server | =sp2 | |
| Microsoft .NET Framework 4 | =3.5 | |
| Windows 10 | ||
| Windows 10 | =1607 | |
| Windows 10 | =1703 | |
| Windows 10 | =1709 | |
| Windows 10 | =1803 | |
| Microsoft Windows | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft .NET Framework 4 | =3.5.1 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows Server | =r2-sp1 | |
| Microsoft .NET Framework 4 | =4.5.2 | |
| Microsoft Windows RT | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft .NET Framework 4 | =4.6 | |
| Microsoft .NET Framework 4 | =4.6.2 | |
| Microsoft .NET Framework 4 | =4.7 | |
| Microsoft .NET Framework 4 | =4.7.1 | |
| Microsoft .NET Framework 4 | =4.7.2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft .NET Framework 4 | =4.6.1 | |
| Microsoft Windows Server | =1709 | |
| Microsoft Windows Server | =1803 |
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Reference Links
Frequently Asked Questions
What is CVE-2018-8421?
CVE-2018-8421 is a remote code execution vulnerability in Microsoft .NET Framework.
What software is affected by CVE-2018-8421?
Microsoft .NET Framework versions 2.0, 3.0, 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 are affected by CVE-2018-8421.
What is the severity of CVE-2018-8421?
CVE-2018-8421 has a severity rating of 9.8, which is considered critical.
How can I fix CVE-2018-8421?
To fix CVE-2018-8421, update your Microsoft .NET Framework installation to a patched version provided by Microsoft.
Where can I find more information about CVE-2018-8421?
You can find more information about CVE-2018-8421 on the following websites: [SecurityFocus](http://www.securityfocus.com/bid/105222), [SecurityTracker](http://www.securitytracker.com/id/1041636), [Microsoft Security Advisory](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8421).
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- agent/remedy
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- agent/references
- agent/weakness
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/microsoft
- canonical/microsoft .net framework 4
- version/microsoft .net framework 4/2.0-sp2
- version/microsoft .net framework 4/3.0-sp2
- canonical/microsoft windows server
- version/microsoft windows server/sp2
- version/microsoft .net framework 4/3.5
- canonical/windows 10
- version/windows 10/1607
- version/windows 10/1703
- version/windows 10/1709
- version/windows 10/1803
- canonical/microsoft windows
- version/microsoft windows server/r2
- canonical/microsoft windows server 2016
- version/microsoft .net framework 4/3.5.1
- canonical/microsoft windows 7
- version/microsoft windows 7/sp1
- version/microsoft windows server/r2-sp1
- version/microsoft .net framework 4/4.5.2
- canonical/microsoft windows rt
- version/microsoft .net framework 4/4.6
- version/microsoft .net framework 4/4.6.2
- version/microsoft .net framework 4/4.7
- version/microsoft .net framework 4/4.7.1
- version/microsoft .net framework 4/4.7.2
- version/microsoft .net framework 4/4.6.1
- version/microsoft windows server/1709
- version/microsoft windows server/1803