# CVE-2017-11927: Microsoft Windows Information Disclosure Vulnerability CVE-2017-11927 is fixed in 30 products on 1 platform, first by KB4053578, released December 12, 2017. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2017-11927 - Priority: Routine - CVSS: 4.3 (Important) - EPSS: 0.0962 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Dec 12, 2017 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11927 ## Description

An information disclosure vulnerability exists when the Windows its:// protocol handler unnecessarily sends traffic to a remote site in order to determine the zone of a provided URL. This could potentially result in the disclosure of sensitive information to a malicious site.

To exploit the vulnerability an attacker would have to trick a user into browsing to a malicious website or to an SMB or UNC path destination. An attacker who successfully tricked a user into disclosing the user's NTLM hash could attempt a brute-force attack to disclose the corresponding hash password.

The security update addresses the vulnerability by correcting how the Windows its:// protocol handler determines the zone of a request.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.1295 | [KB4053578](https://patchblox.com/security/data/fix/microsoft/kb4053578.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.1295 | [KB4053578](https://patchblox.com/security/data/fix/microsoft/kb4053578.md) | Dec 12, 2017 | | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2248 | [KB4103723](https://patchblox.com/security/data/fix/microsoft/kb4103723.md) | May 8, 2018 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2248 | [KB4103723](https://patchblox.com/security/data/fix/microsoft/kb4103723.md) | May 8, 2018 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1088 | [KB4103731](https://patchblox.com/security/data/fix/microsoft/kb4103731.md) | May 8, 2018 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1088 | [KB4103731](https://patchblox.com/security/data/fix/microsoft/kb4103731.md) | May 8, 2018 | | Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.431 | [KB4103727](https://patchblox.com/security/data/fix/microsoft/kb4103727.md) | May 8, 2018 | | Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.431 | [KB4103727](https://patchblox.com/security/data/fix/microsoft/kb4103727.md) | May 8, 2018 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17861 | [KB4103716](https://patchblox.com/security/data/fix/microsoft/kb4103716.md) | May 8, 2018 | | Microsoft | Windows 10 for x64-based Systems | 10240.17861 | [KB4103716](https://patchblox.com/security/data/fix/microsoft/kb4103716.md) | May 8, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4103718](https://patchblox.com/security/data/fix/microsoft/kb4103718.md) | May 8, 2018 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB4103712](https://patchblox.com/security/data/fix/microsoft/kb4103712.md) | May 8, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4103718](https://patchblox.com/security/data/fix/microsoft/kb4103718.md) | May 8, 2018 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB4103712](https://patchblox.com/security/data/fix/microsoft/kb4103712.md) | May 8, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4103725](https://patchblox.com/security/data/fix/microsoft/kb4103725.md) | May 8, 2018 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4103715](https://patchblox.com/security/data/fix/microsoft/kb4103715.md) | May 8, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4103725](https://patchblox.com/security/data/fix/microsoft/kb4103725.md) | May 8, 2018 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4103715](https://patchblox.com/security/data/fix/microsoft/kb4103715.md) | May 8, 2018 | | Microsoft | Windows RT 8.1 | | [KB4103725](https://patchblox.com/security/data/fix/microsoft/kb4103725.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4103718](https://patchblox.com/security/data/fix/microsoft/kb4103718.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB4103712](https://patchblox.com/security/data/fix/microsoft/kb4103712.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4103718](https://patchblox.com/security/data/fix/microsoft/kb4103718.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4103712](https://patchblox.com/security/data/fix/microsoft/kb4103712.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4103718](https://patchblox.com/security/data/fix/microsoft/kb4103718.md) | May 8, 2018 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB4103712](https://patchblox.com/security/data/fix/microsoft/kb4103712.md) | May 8, 2018 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4130957](https://patchblox.com/security/data/fix/microsoft/kb4130957.md) | Dec 12, 2017 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB4130957](https://patchblox.com/security/data/fix/microsoft/kb4130957.md) | Dec 12, 2017 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB4130957](https://patchblox.com/security/data/fix/microsoft/kb4130957.md) | Dec 12, 2017 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4130957](https://patchblox.com/security/data/fix/microsoft/kb4130957.md) | Dec 12, 2017 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB4130957](https://patchblox.com/security/data/fix/microsoft/kb4130957.md) | Dec 12, 2017 | | Microsoft | Windows Server 2012 | | [KB4103730](https://patchblox.com/security/data/fix/microsoft/kb4103730.md) | May 8, 2018 | | Microsoft | Windows Server 2012 | | [KB4103726](https://patchblox.com/security/data/fix/microsoft/kb4103726.md) | May 8, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4103730](https://patchblox.com/security/data/fix/microsoft/kb4103730.md) | May 8, 2018 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4103726](https://patchblox.com/security/data/fix/microsoft/kb4103726.md) | May 8, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4103725](https://patchblox.com/security/data/fix/microsoft/kb4103725.md) | May 8, 2018 | | Microsoft | Windows Server 2012 R2 | | [KB4103715](https://patchblox.com/security/data/fix/microsoft/kb4103715.md) | May 8, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4103725](https://patchblox.com/security/data/fix/microsoft/kb4103725.md) | May 8, 2018 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4103715](https://patchblox.com/security/data/fix/microsoft/kb4103715.md) | May 8, 2018 | | Microsoft | Windows Server 2016 | 14393.2248 | [KB4103723](https://patchblox.com/security/data/fix/microsoft/kb4103723.md) | May 8, 2018 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.2248 | [KB4103723](https://patchblox.com/security/data/fix/microsoft/kb4103723.md) | May 8, 2018 | | Microsoft | Windows Server, version 1709 (Server Core Installation) | 16299.431 | [KB4103727](https://patchblox.com/security/data/fix/microsoft/kb4103727.md) | May 8, 2018 | --- Data as of 2026-11-10T07:50:38Z UTC. 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