Add security reporting policy documentation (#201)

Author: HowardWolosky

README.md

@@ -15,6 +15,7 @@
 *   [Legal and Licensing](#legal-and-licensing)
 *   [Governance](#governance)
 *   [Code of Conduct](#code-of-conduct)
+*   [Reporting Security Issues](#reporting-security-issues)
 *   [Privacy Policy](#privacy-policy)
 
 ----------
@@ -159,6 +160,12 @@ For more info, see [CODE_OF_CONDUCT](CODE_OF_CONDUCT.md)
 
 ----------
 
+## Reporting Security Issues
+
+Please refer to [SECURITY.md](./SECURITY.md).
+
+----------
+
 ## Privacy Policy
 
 For more information, refer to Microsoft's [Privacy Policy](https://go.microsoft.com/fwlink/?LinkID=521839).

SECURITY.md

@@ -0,0 +1,48 @@
+<!-- BEGIN MICROSOFT SECURITY.MD V0.0.1 BLOCK -->
+
+## Security
+
+Microsoft takes the security of our software products and services seriously, which includes all
+source code repositories managed through our GitHub organizations, which include
+[Microsoft](https://github.com/Microsoft), [Azure](https://github.com/Azure),
+[DotNet](https://github.com/dotnet), [AspNet](https://github.com/aspnet),
+[Xamarin](https://github.com/xamarin), and [many more](https://opensource.microsoft.com/).
+
+If you believe you have found a security vulnerability in any Microsoft-owned repository that meets
+Microsoft's [definition](https://docs.microsoft.com/en-us/previous-versions/tn-archive/cc751383(v=technet.10))
+of a security vulnerability, please report it to us as described below.
+
+## Reporting Security Issues
+
+**Please do not report security vulnerabilities through public GitHub issues.** Instead, please
+report them to the Microsoft Security Response Center at [[email protected]](mailto:[email protected]).
+If possible, encrypt your message with our PGP key; please download it from the
+[Microsoft Security Response Center PGP Key page](https://technet.microsoft.com/en-us/security/dn606155).
+
+You should receive a response within 24 hours. If for some reason you do not, please follow up via
+email to ensure we received your original message. Additional information can be found at
+[microsoft.com/msrc](https://www.microsoft.com/msrc).
+
+Please include the requested information listed below (as much as you can provide) to help us better
+understand the nature and scope of the possible issue:
+
+  * Type of issue (e.g. buffer overflow, SQL injection, cross-site scripting, etc.)
+  * Full paths of source file(s) related to the manifestation of the issue
+  * The location of the affected source code (tag/branch/commit or direct URL)
+  * Any special configuration required to reproduce the issue
+  * Step-by-step instructions to reproduce the issue
+  * Proof-of-concept or exploit code (if possible)
+  * Impact of the issue, including how an attacker might exploit the issue
+
+This information will help us triage your report more quickly.
+
+## Preferred Languages
+
+We prefer all communications to be in English.
+
+## Policy
+
+Microsoft follows the principle of
+[Coordinated Vulnerability Disclosure](https://www.microsoft.com/en-us/msrc/cvd).
+
+<!-- END MICROSOFT SECURITY.MD BLOCK -->