CVE-2016-3227

Windows DNS Server Use After Free Vulnerability

CVE-2016-3227 is fixed in 4 products on 1 platform, first by KB3161951, released June 14, 2016. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
n/a
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.2546
97th percentile

<p>A remote code execution vulnerability exists in Windows <a href="undefinedhttps://technet.microsoft.com/en-us/library/security/dn848375.aspx#DNS">Domain Name System (DNS)</a> servers when they fail to properly handle requests. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the Local System Account. Windows servers that are configured as DNS servers are at risk from this vulnerability.</p> <p>To exploit the vulnerability, an unauthenticated attacker could send malicious requests to a Windows DNS server.</p> <p>The update addresses the vulnerability by modifying how Windows DNS servers handle requests.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows Server 2012 KB3161951 Jun 14, 2016
Windows Server 2012 (Server Core installation) KB3161951 Jun 14, 2016
Windows Server 2012 R2 KB3161951 Jun 14, 2016
Windows Server 2012 R2 (Server Core installation) KB3161951 Jun 14, 2016