# CVE-2017-11779: Windows DNSAPI Remote Code Execution Vulnerability CVE-2017-11779 is fixed in 17 products on 1 platform, first by KB4041689, released October 10, 2017. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2017-11779 - Priority: Urgent - CVSS: 8.1 (Critical) - EPSS: 0.3310 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Oct 10, 2017 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11779 ## Description

A remote code execution vulnerability exists in Windows Domain Name System (DNS) DNSAPI.dll when it fails to properly handle DNS responses. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the Local System Account.

To exploit the vulnerability, the attacker would use a malicious DNS server to send corrupted DNS responses to the target.

The update addresses the vulnerability by modifying how Windows DNSAPI.dll handles DNS responses.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.1176 | [KB4041689](https://patchblox.com/security/data/fix/microsoft/kb4041689.md) | Oct 10, 2017 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.1176 | [KB4041689](https://patchblox.com/security/data/fix/microsoft/kb4041689.md) | Oct 10, 2017 | | Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.674 | [KB4041676](https://patchblox.com/security/data/fix/microsoft/kb4041676.md) | Oct 10, 2017 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.674 | [KB4041676](https://patchblox.com/security/data/fix/microsoft/kb4041676.md) | Oct 10, 2017 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17643 | [KB4042895](https://patchblox.com/security/data/fix/microsoft/kb4042895.md) | Oct 10, 2017 | | Microsoft | Windows 10 for x64-based Systems | 10240.17643 | [KB4042895](https://patchblox.com/security/data/fix/microsoft/kb4042895.md) | Oct 10, 2017 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4041693](https://patchblox.com/security/data/fix/microsoft/kb4041693.md) | Oct 10, 2017 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB4041687](https://patchblox.com/security/data/fix/microsoft/kb4041687.md) | Oct 10, 2017 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4041693](https://patchblox.com/security/data/fix/microsoft/kb4041693.md) | Oct 10, 2017 | | Microsoft | Windows 8.1 for x64-based systems | | [KB4041687](https://patchblox.com/security/data/fix/microsoft/kb4041687.md) | Oct 10, 2017 | | Microsoft | Windows RT 8.1 | | [KB4041693](https://patchblox.com/security/data/fix/microsoft/kb4041693.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 | | [KB4041690](https://patchblox.com/security/data/fix/microsoft/kb4041690.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 | | [KB4041679](https://patchblox.com/security/data/fix/microsoft/kb4041679.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4041690](https://patchblox.com/security/data/fix/microsoft/kb4041690.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB4041679](https://patchblox.com/security/data/fix/microsoft/kb4041679.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 R2 | | [KB4041693](https://patchblox.com/security/data/fix/microsoft/kb4041693.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 R2 | | [KB4041687](https://patchblox.com/security/data/fix/microsoft/kb4041687.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4041693](https://patchblox.com/security/data/fix/microsoft/kb4041693.md) | Oct 10, 2017 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB4041687](https://patchblox.com/security/data/fix/microsoft/kb4041687.md) | Oct 10, 2017 | | Microsoft | Windows Server 2016 | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 | | Microsoft | Windows Server 2016 (Server Core installation) | 14393.1770 | [KB4041691](https://patchblox.com/security/data/fix/microsoft/kb4041691.md) | Oct 10, 2017 | --- Data as of 2026-11-07T12:40:37Z 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