QID 982421

QID 982421: Java (maven) Security Update for io.dropwizard:dropwizard-validation (GHSA-8jpx-m2wh-2v34)

Security update has been released for io.dropwizard:dropwizard-validation to fix the vulnerability.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

This issue may allow Remote Code Execution (RCE), allowing to run arbitrary code on the host system (with the privileges of the Dropwizard service account privileges) by injecting arbitrary [Java Expression Language (EL)](https://docs.jboss.org/hibernate/validator/6.1/reference/en-US/html_single/#section-interpolation-with-message-expressions) expressions when using the self-validating feature ([`@SelfValidating`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/SelfValidating.html), [`@SelfValidation`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/SelfValidation.html)) in **dropwizard-validation**.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as Critical - 9 severity.
    • Solution
    The issue has been fixed in **dropwizard-validation** **1.3.21** and **2.0.3** or later. We strongly recommend upgrading to one of these versions.

    The evaluation of EL expressions has been disabled by default now.

    In order to use some interpolation in the violation messages added to [`ViolationCollector`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html), it has to be explicitly allowed by setting [`SelfValidating#escapeExpressions()`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/SelfValidating.html#escapeExpressions--) to `false`.

    It is also recommended to use the `addViolation` methods supporting message parameters instead of EL expressions introduced in Dropwizard 1.3.21 and 2.0.3:
    * [`ViolationCollector#addViolation(String, Map<String, Object>`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html#addViolation-java.lang.String-java.util.Map-)
    * [`ViolationCollector#addViolation(String, String, Map<String, Object>`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html#addViolation-java.lang.String-java.lang.String-java.util.Map-)
    * [`ViolationCollector#addViolation(String, String, Integer, Map<String, Object>`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html#addViolation-java.lang.String-java.lang.Integer-java.lang.String-java.util.Map-)
    * [`ViolationCollector#addViolation(String, String, String, Map<String, Object>`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html#addViolation-java.lang.String-java.lang.String-java.lang.String-java.util.Map-)Workaround:
    If you are not able to upgrade to one of the aforementioned versions of **dropwizard-validation** but still want to use the [`@SelfValidating`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.2/io/dropwizard/validation/selfvalidating/SelfValidating.html) feature, make sure to properly sanitize any message you're adding to the [`ViolationCollector`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/ViolationCollector.html) in the method annotated with [`@SelfValidation`](https://javadoc.io/static/io.dropwizard/dropwizard-project/2.0.3/io/dropwizard/validation/selfvalidating/SelfValidation.html).

    Example:
    ```java
    @SelfValidation
    public void validateFullName(ViolationCollector col) {
    if (fullName.contains("_")) {
    // Sanitize fullName variable by escaping relevant characters such as "$"
    col.addViolation("Full name contains invalid characters: " + sanitizeJavaEl(fullName));
    }
    }
    ```

    See also:
    https://github.com/dropwizard/dropwizard/blob/v2.0.3/dropwizard-validation/src/main/java/io/dropwizard/validation/InterpolationHelper.java
    Vendor References

    CVEs related to QID 982421

    CVE-2020-11002 |
    Software Advisories
    Advisory ID Software Component Link
    GHSA-8jpx-m2wh-2v34 io.dropwizard:dropwizard-validation URL Logo github.com/advisories/GHSA-8jpx-m2wh-2v34
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