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63 lines
3.1 KiB
Markdown
63 lines
3.1 KiB
Markdown
# Security Patch Workflow
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This document describes how to patch vulnerabilities in Constellation.
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## Guiding Principles
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* Constellation vulnerabilities and security patches must be shared on need-to-know basis.
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* A vulnerability is only fixed if a patch exists for all supported versions.
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* Affected users must be informed about vulnerabilities affecting their setups.
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* Vulnerabilities in Constellation should be fixed as quickly as possible.
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## Vulnerability Report
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Someone found a vulnerability in Constellation.
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If they followed [SECURITY.md](/SECURITY.md), a Github Security Advisory (GHSA) might already exist.
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Otherwise, now is the time to [create a draft](https://github.com/edgelesssys/constellation/security/advisories/new).
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Make sure that the GHSA includes a problem statement that gives sufficient context and add domain experts as collaborators.
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## Mitigation
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Investigate possible mitigations for the vulnerability that don't require a patch release.
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Such mitigations could include additional firewall settings, manual cluster configuration changes, etc.
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Add all reasonable mitigation instructions to the GHSA.
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If the vulnerability has already been disclosed publicly, the GHSA should also be disclosed at this stage.
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Add an ETA for a patch release and proceed with [disclosure steps](#disclosing-the-ghsa).
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## Fix
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The first step towards fixing the vulnerability is to assess the amount of work required.
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Use this estimate to propose a target release date and inform the product manager about impact and timeline.
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The product manager will notify customers of the upcoming patch release.
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Sometimes a fix can be developed quickly for `main`, but correctly backporting it takes more time.
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It may also happen that a proposed fix needs substantial work before merging.
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In order to avoid premature disclosure of the vulnerability, while still allowing for collaboration, we use the GHSA's temporary repository.
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1. On the drafted GHSA, create a temporary repository to work on a fix.
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1. Develop a fix on a local branch, targeting `main`.
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1. Manually run static checks (unit tests, linters, etc.).
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1. Push the branch to the temporary fork and open a PR.
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This is necessary because the fork can't run Github Actions.
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1. Solicit and incorporate feedback on the PR.
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1. Manually test a fixed version, possibly including upgrade tests.
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When the PR is ready, cherry-pick its commits to your local version of the release branch.
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Repeat the steps above, but target the PR at the corresponding release branch.
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Once PRs are ready for all necessary patches, hit the merge button on the GHSA.
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This will merge all PRs, but the GHSA will stay in draft mode for now.
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## Disclosing the GHSA
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The following steps need to be performed by a repository admin.
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1. Ensure that the GHSA text is in shape for publication.
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In particular, look out for any empty sections and placeholder text.
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1. Fill in the `Affected Versions` and `Patched Versions` fields.
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1. Check that the severity setting is accurate.
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1. Credit external collaborators, e.g. by @-mention.
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1. Hit the `Publish Advisory` button.
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1. Notify the product manager to share patch and advisory with customers.
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