# CVE-2017-0012: Microsoft Browser Spoofing Vulnerability CVE-2017-0012 is fixed in 20 products on 1 platform, first by KB4013198, released March 14, 2017. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2017-0012 - Priority: Routine - CVSS: 4.3 (Important) - EPSS: 0.0858 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: yes - Vendor exploitability assessment: Exploitation Unlikely - Published: Mar 14, 2017 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-0012 ## Description

A spoofing vulnerability exists when Microsoft browsers do not properly parse HTTP content. An attacker who successfully exploited this vulnerability could trick a user by redirecting the user to a specially crafted website. The specially crafted website could either spoof content or serve as a pivot to chain an attack with other vulnerabilities in web services.

To exploit the vulnerability, the user must click a specially crafted URL. In an email attack scenario, an attacker could send an email message containing the specially crafted URL to the user in an attempt to convince the user to click it.

In a web-based attack scenario, an attacker could host a specially crafted website designed to appear as a legitimate website to the user. However, the attacker would have no way to force the user to visit the specially crafted website. The attacker would have to convince the user to visit the specially crafted website, typically by way of enticement in an email or instant message, and then convince the user to interact with content on the website.

The update addresses the vulnerability by correcting how Microsoft browsers parse HTTP responses.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows RT 8.1 | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4012204](https://patchblox.com/security/data/fix/microsoft/kb4012204.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2016 | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for 32-bit Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for x64-based Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | --- Data as of 2026-11-07T18:46:35Z UTC. 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