# CVE-2018-8378: Microsoft Office Information Disclosure Vulnerability

CVE-2018-8378 is fixed in 15 products on 1 platform, first by KB4022195, released August 14, 2018. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2018-8378
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0731
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 14, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8378

## Description

<p>An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory.</p> <p>Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software.</p> <p>The security update addresses the vulnerability by properly initializing the affected variable.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Excel Viewer 2007 Service Pack 3 |  | [KB4022195](https://patchblox.com/security/data/fix/microsoft/kb4022195.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB4022198](https://patchblox.com/security/data/fix/microsoft/kb4022198.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (32-bit editions) |  | [KB3213636](https://patchblox.com/security/data/fix/microsoft/kb3213636.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB4022198](https://patchblox.com/security/data/fix/microsoft/kb4022198.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2010 Service Pack 2 (64-bit editions) |  | [KB3213636](https://patchblox.com/security/data/fix/microsoft/kb3213636.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2013 RT Service Pack 1 |  | [KB4032239](https://patchblox.com/security/data/fix/microsoft/kb4032239.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (32-bit editions) |  | [KB4032239](https://patchblox.com/security/data/fix/microsoft/kb4032239.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2013 Service Pack 1 (64-bit editions) |  | [KB4032239](https://patchblox.com/security/data/fix/microsoft/kb4032239.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2016 (32-bit edition) |  | [KB4032233](https://patchblox.com/security/data/fix/microsoft/kb4032233.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office 2016 (64-bit edition) |  | [KB4032233](https://patchblox.com/security/data/fix/microsoft/kb4032233.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office Web Apps 2010 Service Pack 2 |  | [KB4032220](https://patchblox.com/security/data/fix/microsoft/kb4032220.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office Web Apps 2013 Service Pack 1 |  | [KB4022238](https://patchblox.com/security/data/fix/microsoft/kb4022238.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office Word Viewer |  | [KB4092434](https://patchblox.com/security/data/fix/microsoft/kb4092434.md) | Aug 14, 2018 |
| Microsoft | Microsoft Office Word Viewer |  | [KB4092433](https://patchblox.com/security/data/fix/microsoft/kb4092433.md) | Aug 14, 2018 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB4022234](https://patchblox.com/security/data/fix/microsoft/kb4022234.md) | Aug 14, 2018 |
| Microsoft | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 |  | [KB4018392](https://patchblox.com/security/data/fix/microsoft/kb4018392.md) | Aug 14, 2018 |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB4032256](https://patchblox.com/security/data/fix/microsoft/kb4032256.md) | Aug 14, 2018 |
| Microsoft | Microsoft SharePoint Server 2013 Service Pack 1 |  | [KB4022236](https://patchblox.com/security/data/fix/microsoft/kb4022236.md) | Aug 14, 2018 |
| Microsoft | Word Automation Services on Microsoft SharePoint Server 2010 Service Pack 2 |  | [KB4032215](https://patchblox.com/security/data/fix/microsoft/kb4032215.md) | Aug 14, 2018 |

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