# CVE-2017-8585: .NET Denial of Service Vulnerability

CVE-2017-8585 is fixed in 10 products on 1 platform, first by KB4025338, released July 11, 2017. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-8585
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0950
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Jul 11, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-8585

## Description

<p>A denial of service vulnerability exists when Microsoft Common Object Runtime Library improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET web application.</p> <p>A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET application.</p> <p>The update addresses the vulnerability by correcting how the .NET web application handles web requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft .NET Framework 4.6 on Windows 10 for 32-bit Systems | 10240.17488 | [KB4025338](https://patchblox.com/security/data/fix/microsoft/kb4025338.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6 on Windows 10 for x64-based Systems | 10240.17488 | [KB4025338](https://patchblox.com/security/data/fix/microsoft/kb4025338.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for 32-bit Systems | 10586.1007 | [KB4025344](https://patchblox.com/security/data/fix/microsoft/kb4025344.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.1 on Windows 10 Version 1511 for x64-based Systems | 10586.1007 | [KB4025344](https://patchblox.com/security/data/fix/microsoft/kb4025344.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for 32-bit Systems | 14393.1480 | [KB4025339](https://patchblox.com/security/data/fix/microsoft/kb4025339.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7 on Windows 10 Version 1607 for x64-based Systems | 14393.1480 | [KB4025339](https://patchblox.com/security/data/fix/microsoft/kb4025339.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016 | 14393.1480 | [KB4025339](https://patchblox.com/security/data/fix/microsoft/kb4025339.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7 on Windows Server 2016  (Server Core installation) | 14393.1480 | [KB4025339](https://patchblox.com/security/data/fix/microsoft/kb4025339.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for 32-bit Systems | 15063.483 | [KB4025342](https://patchblox.com/security/data/fix/microsoft/kb4025342.md) | Jul 11, 2017 |
| Microsoft | Microsoft .NET Framework 4.7 on Windows 10 Version 1703 for x64-based Systems | 15063.483 | [KB4025342](https://patchblox.com/security/data/fix/microsoft/kb4025342.md) | Jul 11, 2017 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo