KubeLinter is a static analysis tool that checks Kubernetes YAML files and Helm charts to ensure the applications represented in them adhere to best practices.
This patch release contains fixes for the following security vulnerabilities in the cert-manager-controller:
GO-2023-2334: Decryption of malicious PBES2 JWE objects can consume unbounded system resources.
If you use ArtifactHub Security report or trivy, this patch will also silence the following warning about a vulnerability in code which is imported but not used by the cert-manager-controller:
CVE-2023-47108: DoS vulnerability in otelgrpc due to unbound cardinality metrics.
An ongoing security audit of cert-manager suggested some changes to the webhook code to mitigate DoS attacks, and these are included in this patch release.
Changes
Bug or Regression
The webhook server now returns HTTP error 413 (Content Too Large) for requests with body size >= 3MiB. This is to mitigate DoS attacks that attempt to crash the webhook process by sending large requests that exceed the available memory. (#6507, @inteon)
The webhook server now returns HTTP error 400 (Bad Request) if the request contains an empty body. (#6507, @inteon)
The webhook server now returns HTTP error 500 (Internal Server Error) rather than crashing, if the code panics while handling a request. (#6507, @inteon)
Mitigate potential "Slowloris" attacks by setting ReadHeaderTimeout in all http.Server instances. (#6538, @wallrj)
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Bumps github.com/cert-manager/cert-manager from 1.13.2 to 1.13.3.
Release notes
Sourced from github.com/cert-manager/cert-manager's releases.
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Commits
876e386Merge pull request #6538 from wallrj/backport-6534-to-release-1.13d080cecAdd ReadHeaderTimeout to all http.Server where that setting is missingd1e2d25Merge pull request #6514 from inteon/release-1.13_bump9f704edupgrade otel, docker and jose to fix CVE alerts751e082Merge pull request #6507 from jetstack-bot/cherry-pick-6498-to-release-1.130ad1184limit webhook admission input895a19eMerge pull request #6484 from jetstack-bot/cherry-pick-6479-to-release-1.13d8e97d4Use explicit debian version for base imagese997b73Merge pull request #6480 from jetstack-bot/cherry-pick-6477-to-release-1.1353520d1regenerate hardcoded certsDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase.Dependabot will merge this PR once CI passes on it, as requested by @roxbot.
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