# CVE-2018-8444: Windows SMB Information Disclosure Vulnerability

CVE-2018-8444 is fixed in 9 products on 1 platform, first by KB4457132, released September 11, 2018. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-8444
- Priority: High
- CVSS: 7.0 (Important)
- EPSS: 0.0586
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: N/A
- Published: Sep 11, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8444

## Description

<p>An information disclosure vulnerability exists in the way that the Microsoft Server Message Block 2.0 (SMBv2) server handles certain requests. An attacker who successfully exploited this vulnerability could craft a special packet, which could lead to information disclosure from the server.</p> <p>To exploit the vulnerability, in most situations, an unauthenticated attacker could send a specially crafted packet to a targeted SMBv2 server.</p> <p>The security update addresses the vulnerability by correcting how SMBv2 handles these specially crafted requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 for 32-bit Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows RT 8.1 |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |

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