Updated security response guidance

security-response.md

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+# Security Response Guidelines
+
+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 OpenTelemetry Technical Committee (OTel TC) and relevant repo maintainers,
+supported by tooling provided by the SIG-Security, are responsible for
+responding to the incident organizing the entire response including internal
+communication and external disclosure.
+
+## Supported Versions
+
+The OTel project provides community support only for the last overall minor
+version: bug fixes are released either as part of the next minor version or as
+an on-demand patch version. Independent of which version is next, all patch
+versions are cumulative, meaning that they represent the state of our `main`
+branch at the moment of the release. For instance, if the latest version is
+0.10.0, bug fixes are released either as part of 0.11.0 or 0.10.1.
+
+Security fixes are given priority and might be enough to cause a new version to
+be released. Each repository is entitled to establish their own complementary
+processes. SIG-Security in conjunction with the TC can advise in case
+clarifications are required.  
+
+## Disclosures
+
+### Private Disclosure Processes
+
+In order for the vulnerability reports to reach maintainers as soon as possible,
+the preferred way is to use the `Report a vulnerability` button on the
+`Security` tab in the respective GitHub repository. It creates a private
+communication channel between the reporter and the maintainers.
+
+If you are absolutely unable to or have strong reasons not to use GitHub
+reporting workflow, please reach out to the Technical Committee using
+[cncf-opentelemetry-tc@lists.cncf.io](mailto:cncf-opentelemetry-tc@lists.cncf.io)
+and we will provide instruction on how to report the vulnerability using an
+encrypted message, if desired.
+
+[gh-organization]: https://github.com/open-telemetry
+
+### Public Disclosure Processes
+
+If you know of a publicly disclosed security vulnerability please IMMEDIATELY
+email
+[cncf-opentelemetry-tc@lists.cncf.io](mailto:cncf-opentelemetry-tc@lists.cncf.io)
+to inform the Security Response Committee (SRC) about the vulnerability so they
+may start the patch, release, and communication process. Please include any relevant
+information about current public exploitations of this vulnerability if known to
+help with scoring and priortization.
+
+The TC should receive the message and re-direct it to the relevant repo
+maintainers for ownership. If possible the repo maintainers will engage and ask
+the person making the public report if the issue can be handled via a private
+disclosure process. If the reporter denies the request, the repo maintainers
+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
+
+### Fix Team Organization
+
+The Fix Team is made up of the relevant repo maintainers.
+
+### TC Role
+
+- Add the relevant repo maintainers to open incidents
+- A member of the TC will need to review the proposed CVSS score and severity from the Fix Team
+- Acknowledge when a proposed fix is completed
+
+### Fix Development Process
+
+All of the timelines below are suggestions that assume a Private Disclosure and
+that the report is accepted as valid.
+
+#### Initial Incident Response
+
+- The TC is notified of an incident and the relevant repo maintainers are added
+  as the Fix Team to the issue.
+- The Fix Team acknowledges the incident to the reporter, asks for further
+  details if necessary, and begins mitigation planning.
+- The Fix Team confirms with the reporter if the incident is valid and requires
+  a fix.
+- The Fix Team creates a temporary private branch to start work on the fix.
+- The Fix Team will create a
+  [CVSS](https://www.first.org/cvss/specification-document) Base score using the
+  [CVSS Calculator](https://www.first.org/cvss/calculator/3.1) and ping the TC
+  GitHub team for confirmation.
+- The Fix Team will request a CVE from GitHub and follow up with the reporter.
+- The Fix Team publishes the CVE to the GitHub Security Advisory Database for
+  user notification.
+
+#### Incident Mitigation
+
+The incident mitigation timeline depends on the severity of the incident and
+repo release cadence.
+
+- The Fix Team will ping the TC GitHub team to alert them that work on the fix
+  branch is complete once there are LGTMs on all commits in the temporary
+  private fork created for the GitHub Security Advisory.
+- The updated version is released with the fix.
+- The incident is published to the GitHub Security Advisory Database and
+  affected users are automatically notified using GitHub security alerts.
+
+### Fix Disclosure Process
+
+OTel relies on GitHub tooling to notify the affected repositories and publish a
+security advisory. GitHub will publish the CVE to the CVE List, broadcast the
+Security Advisory via the GitHub Advisory Database, and send security alerts to
+all repositories that use the package and have alerts on.
+
+#### Fix Release Day
+
+The Fix Team as repo owners will release an updated version and optionally
+notify their communities via Slack.
+
+## Severity
+
+The Fix Team evaluates vulnerability severity on a case-by-case
+basis, guided by CVSS 3.1 and is subject to TC review.
+
+## Retrospective
+
+TBD