# CVE-2017-0055: Microsoft IIS Server XSS Elevation of Privilege Vulnerability CVE-2017-0055 is fixed in 27 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-2017-0055 - Priority: Routine - CVSS: 6.1 (Important) - EPSS: 0.1637 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Mar 14, 2017 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-0055 ## Description

An elevation of privilege vulnerability exists when Microsoft IIS Server fails to properly sanitize a specially crafted request. An attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on behalf of the victim, and inject malicious content in the victim’s browser.

For this vulnerability to be exploited, a user must click a specially crafted URL.

In an email attack scenario, an attacker could exploit the vulnerability by sending an email message containing the specially crafted URL to the user and by convincing the user to click on the specially crafted URL.

In a web-based attack scenario, an attacker would have to host a website that contains a specially crafted URL. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted website. Instead, an attacker would have to convince users to visit the website, typically by getting them to click a link in an email or instant message that directs them to the affected website by way of a specially crafted URL.

The security update addresses the vulnerability by correcting how Microsoft IIS Server sanitizes web requests.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.839 | [KB4013198](https://patchblox.com/security/data/fix/microsoft/kb4013198.md) | Mar 14, 2017 | | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | | Microsoft | Windows 10 for x64-based Systems | 10240.17319 | [KB4012606](https://patchblox.com/security/data/fix/microsoft/kb4012606.md) | Mar 14, 2017 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4012212](https://patchblox.com/security/data/fix/microsoft/kb4012212.md) | Mar 14, 2017 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4012212](https://patchblox.com/security/data/fix/microsoft/kb4012212.md) | Mar 14, 2017 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4012213](https://patchblox.com/security/data/fix/microsoft/kb4012213.md) | Mar 14, 2017 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4012213](https://patchblox.com/security/data/fix/microsoft/kb4012213.md) | Mar 14, 2017 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Windows RT 8.1 | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4012212](https://patchblox.com/security/data/fix/microsoft/kb4012212.md) | Mar 14, 2017 | | Microsoft | 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 | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4012212](https://patchblox.com/security/data/fix/microsoft/kb4012212.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4012215](https://patchblox.com/security/data/fix/microsoft/kb4012215.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4012212](https://patchblox.com/security/data/fix/microsoft/kb4012212.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 | | [KB4012217](https://patchblox.com/security/data/fix/microsoft/kb4012217.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 | | [KB4012214](https://patchblox.com/security/data/fix/microsoft/kb4012214.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4012217](https://patchblox.com/security/data/fix/microsoft/kb4012217.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4012214](https://patchblox.com/security/data/fix/microsoft/kb4012214.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 R2 | | [KB4012213](https://patchblox.com/security/data/fix/microsoft/kb4012213.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 R2 | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4012213](https://patchblox.com/security/data/fix/microsoft/kb4012213.md) | Mar 14, 2017 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4012216](https://patchblox.com/security/data/fix/microsoft/kb4012216.md) | Mar 14, 2017 | | Microsoft | Windows Server 2016 | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.953 | [KB4013429](https://patchblox.com/security/data/fix/microsoft/kb4013429.md) | Mar 14, 2017 | | Microsoft | Windows Vista Service Pack 2 | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | | Microsoft | Windows Vista x64 Edition Service Pack 2 | | [KB4012373](https://patchblox.com/security/data/fix/microsoft/kb4012373.md) | Mar 14, 2017 | --- Data as of 2026-11-07T06:34:28Z 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