Security release process description (#1861)

* - enhance README to include security release process compatible wiht k8s

* - second version of Security release process, including "Collaborating Projects"

* - reformulate the security release process within a separated doc.

* - add following comment from Sec Team .part 1

* - refactored with comments from Security IB
- refactored considering the same existing document in another CNCF project (envoy)

* - adjust seucrity of README to point the new security process page

* - revert change on FOSSA

* - fix comments from John.

* - removing the todos (I pushed them on the description of the PR)

* - define the PST members in OWNER file

* - fix from review
- add a cahpter for mailing list presentation

* - point the PST members in OWNER file

* - register PST under name 'security' in OWNER file
- early announce will be on coredns-distributors-announce@googlegroup.com
- remove hall of fame reference

* - remove list of security team members from owner file. mailing list of security@coredns.io will be the reference

README.md

@@ -208,3 +208,5 @@ repository](https://github.com/coredns/deployment).
 If you find a security vulnerability or any security related issues, please DO NOT file a public
 issue, instead send your report privately to `security@coredns.io`. Security reports are greatly
 appreciated and we will publicly thank you for it.
+
+Please consult [security vulnerability disclosures and security fix and release process document](https://github.com/coredns/coredns/SECURITY-RELEASE-PROCESS.md)
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SECURITY-RELEASE-PROCESS.md

+# Security Release Process
+
+The CoreDNS project has adopted this security disclosures and response policy
+to ensure responsible handling of critical issues.
+
+
+## Product Security Team (PST)
+
+Security vulnerabilities should be handled quickly and sometimes privately. 
+The primary goal of this process is to reduce the total time users are vulnerable to publicly known exploits.
+
+The Product Security Team (PST) is responsible for organizing the entire response including internal communication and external disclosure.
+
+The initial Product Security Team will consist of the set of maintainers that volunteered.
+
+### mailing lists
+
+* security@coredns.io : for any security concerns. Received by Product Security Team members, and used by this Team to discuss security issues and fixes.
+* coredns-distributors-announce@googlegroup.com: for early private information on Security patch releases. see below how CoreDNS distributors can apply for this list.
+
+
+## Disclosures
+
+### Private Disclosure Processes
+
+If you find a security vulnerability or any security related issues, 
+please DO NOT file a public issue. Do not create a Github issue.
+Instead, send your report privately to security@coredns.io.
+Security reports are greatly appreciated and we will publicly thank you for it.
+
+Please provide as much information as possible, so we can react quickly.
+For instance, that could include:
+- Description of the location and potential impact of the vulnerability;
+- A detailed description of the steps required to reproduce the vulnerability (POC scripts, screenshots, and compressed packet captures are all helpful to us)
+- Whatever else you think we might need to identify the source of this vulnerability
+
+### Public Disclosure Processes
+
+If you know of a publicly disclosed security vulnerability please IMMEDIATELY email security@coredns.io 
+to inform the Product Security Team (PST) about the vulnerability so we start the patch, release, and communication process.
+
+If possible the PST will ask the person making the public report if the issue can be handled via a private disclosure process
+(for example if the full exploit details have not yet been published).
+If the reporter denies the request for private disclosure, the PST will move swiftly with the fix and release process.
+In extreme cases you can ask GitHub to delete the issue but this generally isn't necessary and is unlikely to make a public disclosure less damaging.
+
+## Patch, Release, and Public Communication
+
+For each vulnerability a member of the PST will volunteer to lead coordination with the "Fix Team"
+and is responsible for sending disclosure emails to the rest of the community.
+This lead will be referred to as the "Fix Lead."
+
+The role of Fix Lead should rotate round-robin across the PST.
+
+Note that given the current size of the CoreDNS community it is likely that the PST is the same as the "Fix team."
+The PST may decide to bring in additional contributors for added expertise depending on the area of the code that contains the vulnerability.
+
+All of the timelines below are suggestions and assume a Private Disclosure.
+If the Team is dealing with a Public Disclosure all timelines become ASAP. 
+If the fix relies on another upstream project's disclosure timeline, that will adjust the process as well.
+We will work with the upstream project to fit their timeline and best protect our users.
+
+### Fix Team Organization
+
+These steps should be completed within the first 24 hours of disclosure.
+
+- The Fix Lead will work quickly to identify relevant engineers from the affected projects and
+  packages and CC those engineers into the disclosure thread. These selected developers are the Fix
+  Team.
+- The Fix Lead will get the Fix Team access to private security repos to develop the fix.
+
+
+### Fix Development Process
+
+These steps should be completed within the 1-7 days of Disclosure.
+
+- The Fix Lead and the Fix Team will create a
+  [CVSS](https://www.first.org/cvss/specification-document) using the [CVSS
+  Calculator](https://www.first.org/cvss/calculator/3.0). The Fix Lead makes the final call on the
+  calculated CVSS; it is better to move quickly than making the CVSS perfect.
+- The Fix Team will notify the Fix Lead that work on the fix branch is complete once there are LGTMs
+  on all commits in the private repo from one or more maintainers.
+
+If the CVSS score is under 4.0 ([a low severity
+score](https://www.first.org/cvss/specification-document#i5)) the Fix Team can decide to slow the
+release process down in the face of holidays, developer bandwidth, etc. These decisions must be
+discussed on the security@coredns.io mailing list.
+
+### Fix Disclosure Process
+
+With the Fix Development underway the CoreDNS Security Team needs to come up with an overall communication plan for the wider community. 
+This Disclosure process should begin after the Team has developed a fix or mitigation 
+so that a realistic timeline can be communicated to users.
+
+**Disclosure of Forthcoming Fix to Users** (Completed within 1-7 days of Disclosure)
+
+- The Fix Lead will create a github issue in CoreDNS project to inform users that a security vulnerability
+has been disclosed and that a fix will be made available, with an estimation of the Release Date. 
+It will include any mitigating steps users can take until a fix is available.
+
+The communication to users should be actionable.
+They should know when to block time to apply patches, understand exact mitigation steps, etc.
+
+**Optional Fix Disclosure to Private Distributors List** (Completed within 1-14 days of Disclosure):
+
+- The Fix Lead will make a determination with the help of the Fix Team if an issue is critical enough to require early disclosure to distributors.
+Generally this Private Distributor Disclosure process should be reserved for remotely exploitable or privilege escalation issues. 
+Otherwise, this process can be skipped.
+- The Fix Lead will email the patches to coredns-distributors-announce@googlegroup.com so distributors can prepare their own release to be available to users on the day of the issue's announcement.
+Distributors should read about the [Private Distributor List](#private-distributor-list) to find out the requirements for being added to this list.
+- **What if a distributor breaks embargo?** The PST will assess the damage and may make the call to release earlier or continue with the plan.
+When in doubt push forward and go public ASAP.
+
+**Fix Release Day** (Completed within 1-21 days of Disclosure)
+
+- the Fix Team will selectively choose all needed commits from the Master branch in order to create a new release on top of the current last version released.
+- Release process will be as usual.
+- The Fix Lead will request a CVE from [DWF](https://github.com/distributedweaknessfiling/DWF-Documentation)
+  and include the CVSS and release details.
+- The Fix Lead will inform all users, devs and integrators, now that everything is public,
+  announcing the new releases, the CVE number, and the relevant merged PRs to get wide distribution
+  and user action. As much as possible this email should be actionable and include links on how to apply
+  the fix to user's environments; this can include links to external distributor documentation.
+
+
+## Private Distributor List
+
+This list is intended to be used primarily to provide actionable information to
+multiple distributor projects at once. This list is not intended for
+individuals to find out about security issues.
+
+### Embargo Policy
+
+The information members receive on coredns-distributors-announce@googlegroup.com must not be
+made public, shared, nor even hinted at anywhere beyond the need-to-know within
+your specific team except with the list's explicit approval. 
+This holds true until the public disclosure date/time that was agreed upon by the list.
+Members of the list and others may not use the information for anything other
+than getting the issue fixed for your respective distribution's users.
+
+Before any information from the list is shared with respective members of your
+team required to fix said issue, they must agree to the same terms and only
+find out information on a need-to-know basis.
+
+In the unfortunate event you share the information beyond what is allowed by
+this policy, you _must_ urgently inform the security@coredns.io
+mailing list of exactly what information leaked and to whom. 
+
+If you continue to leak information and break the policy outlined here, you
+will be removed from the list.
+
+### Contributing Back
+
+This is a team effort. As a member of the list you must carry some water. This
+could be in the form of the following:
+
+**Technical**
+
+- Review and/or test the proposed patches and point out potential issues with
+  them (such as incomplete fixes for the originally reported issues, additional
+  issues you might notice, and newly introduced bugs), and inform the list of the
+  work done even if no issues were encountered.
+
+**Administrative**
+
+- Help draft emails to the public disclosure mailing list.
+- Help with release notes.
+
+### Membership Criteria
+
+To be eligible for the coredns-distributors-announce@googlegroup.com mailing list, your
+distribution should:
+
+1. Be an active distributor of CoreDNS component.
+2. Have a user base not limited to your own organization.
+3. Have a publicly verifiable track record up to present day of fixing security
+   issues.
+4. Not be a downstream or rebuild of another distributor.
+5. Be a participant and active contributor in the community.
+6. Accept the [Embargo Policy](#embargo-policy) that is outlined above.
+7. Have someone already on the list vouch for the person requesting membership
+   on behalf of your distribution.
+
+### Requesting to Join
+
+New membership requests are sent to security@coredns.io.
+
+In the body of your request please specify how you qualify and fulfill each
+criterion listed in [Membership Criteria](#membership-criteria).
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