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.

Urgent
CVSS
8.1
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.3310
98th percentile

<p>A remote code execution vulnerability exists in Windows <a href="https://technet.microsoft.com/en-us/library/security/dn848375.aspx#DNS">Domain Name System (DNS)</a> 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.</p> <p>To exploit the vulnerability, the attacker would use a malicious DNS server to send corrupted DNS responses to the target.</p> <p>The update addresses the vulnerability by modifying how Windows DNSAPI.dll handles DNS responses.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1511 for 32-bit Systems 10586.1176 KB4041689 Oct 10, 2017
Windows 10 Version 1511 for x64-based Systems 10586.1176 KB4041689 Oct 10, 2017
Windows 10 Version 1607 for 32-bit Systems 14393.1770 KB4041691 Oct 10, 2017
Windows 10 Version 1607 for x64-based Systems 14393.1770 KB4041691 Oct 10, 2017
Windows 10 Version 1703 for 32-bit Systems 15063.674 KB4041676 Oct 10, 2017
Windows 10 Version 1703 for x64-based Systems 15063.674 KB4041676 Oct 10, 2017
Windows 10 for 32-bit Systems 10240.17643 KB4042895 Oct 10, 2017
Windows 10 for x64-based Systems 10240.17643 KB4042895 Oct 10, 2017
Windows 8.1 for 32-bit systems KB4041693 Oct 10, 2017
Windows 8.1 for 32-bit systems KB4041687 Oct 10, 2017
Windows 8.1 for x64-based systems KB4041693 Oct 10, 2017
Windows 8.1 for x64-based systems KB4041687 Oct 10, 2017
Windows RT 8.1 KB4041693 Oct 10, 2017
Windows Server 2012 KB4041690 Oct 10, 2017
Windows Server 2012 KB4041679 Oct 10, 2017
Windows Server 2012 (Server Core installation) KB4041690 Oct 10, 2017
Windows Server 2012 (Server Core installation) KB4041679 Oct 10, 2017
Windows Server 2012 R2 KB4041693 Oct 10, 2017
Windows Server 2012 R2 KB4041687 Oct 10, 2017
Windows Server 2012 R2 (Server Core installation) KB4041693 Oct 10, 2017
Windows Server 2012 R2 (Server Core installation) KB4041687 Oct 10, 2017
Windows Server 2016 14393.1770 KB4041691 Oct 10, 2017
Windows Server 2016 (Server Core installation) 14393.1770 KB4041691 Oct 10, 2017