Update dependency com.puppycrawl.tools:checkstyle to v8.29 [SECURITY] - autoclosed

[ghost]

This PR contains the following updates:

Package	Update	Change
com.puppycrawl.tools:checkstyle (source)	minor	8.0 -> 8.29

GitHub Vulnerability Alerts

CVE-2019-9658

Checkstyle prior to 8.18 loads external DTDs by default, which can potentially lead to denial of service attacks or the leaking of confidential information.

CVE-2019-10782

Due to an incomplete fix for CVE-2019-9658, checkstyle was still vulnerable to XML External Entity (XXE) Processing.

Impact

User: Build Maintainers

This vulnerability probably doesn't impact Maven/Gradle users as, in most cases, these builds are processing files that are trusted, or pre-vetted by a pull request reviewer before being run on internal CI infrastructure.

User: Static Analysis as a Service

If you operate a site/service that parses "untrusted" Checkstyle XML configuration files, you are vulnerable to this and should patch.

Note from the discoverer of the original CVE-2019-9658:

While looking at a few companies that run Checkstyle/PMD/ect... as a service I notice that it's a common pattern to run the static code analysis tool inside of a Docker container with the following flags:

--net=none \
--privileged=false \
--cap-drop=ALL

Running the analysis in Docker has the advantage that there should be no sensitive local file information that XXE can exfiltrate from the container. Additionally, these flags prevent vulnerabilities in static analysis tools like Checkstyle from being used to exfiltrate data via XXE or to perform SSRF.
- Jonathan Leitschuh

Patches

Has the problem been patched? What versions should users upgrade to?

Patched, will be released with version 8.29 at 26 Jan 2020.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

No workaround are available

References

• CWE-611: Improper Restriction of XML External Entity Reference
• GitHub Issue Sonar violation: Disable XML external entity (XXE) processing checkstyle/checkstyle#7468

For more information

If you have any questions or comments about this advisory:

• Open an issue in https://github.com/checkstyle/checkstyle/issues

---

Renovate configuration

📅 Schedule: "" in timezone America/Argentina/Buenos_Aires.

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box