critical
10
CWE
20
Advisory Published
Updated

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 SoftwareAffected VersionHow to fix
Microsoft .NET Framework=2.0-sp2
Microsoft .NET Framework=3.0-sp2
Microsoft Windows Server 2008=sp2
Microsoft .NET Framework=3.5
Microsoft Windows 10
Microsoft Windows 10=1607
Microsoft Windows 10=1703
Microsoft Windows 10=1709
Microsoft Windows 10=1803
Microsoft Windows 8.1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft .NET Framework=3.5.1
Microsoft Windows 7=sp1
Microsoft Windows Server 2008=r2-sp1
Microsoft .NET Framework=4.5.2
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=sp2
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft Windows Server 2016
Microsoft .NET Framework=4.6.1
Microsoft Windows Server=1709
Microsoft Windows Server=1803

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8421

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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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