# CVE-2019-11808: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Ratpack

Source: https://junglewise.ai/threats/cve-2019-11808-use-of-cryptographically-weak-pseudo-random-number-generator-prng  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-05-14  
License: CC BY 4.0 with a link back

CVE-2019-11808 · Severity: low · CVSS 3 · Published 2019-05-14

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Ratpack

Technologies: [io.ratpack:ratpack-session (Maven)](https://junglewise.ai/threats/technologies/io-ratpack-ratpack-session). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2019-11808 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-11808 being exploited in the wild.

**How severe is CVE-2019-11808?** Low severity, with a CVSS score of 3, published 14 May 2019.

**Which products and versions are affected?** io.ratpack:ratpack-groovy (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1; io.ratpack:ratpack-java (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1; io.ratpack:ratpack-session (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1.

**Is there a fix for CVE-2019-11808?** Yes. io.ratpack:ratpack-groovy (Maven): upgrade to 1.6.1 or later; io.ratpack:ratpack-java (Maven): upgrade to 1.6.1 or later; io.ratpack:ratpack-session (Maven): upgrade to 1.6.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-11808?** Check whether you run io.ratpack:ratpack-groovy (Maven), io.ratpack:ratpack-java (Maven) or io.ratpack:ratpack-session (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- io.ratpack:ratpack-groovy (Maven): upgrade to 1.6.1 or later

  ```sh
  # set io.ratpack:ratpack-groovy to 1.6.1 in your pom.xml or build.gradle
  ```

- io.ratpack:ratpack-java (Maven): upgrade to 1.6.1 or later

  ```sh
  # set io.ratpack:ratpack-java to 1.6.1 in your pom.xml or build.gradle
  ```

- io.ratpack:ratpack-session (Maven): upgrade to 1.6.1 or later

  ```sh
  # set io.ratpack:ratpack-session to 1.6.1 in your pom.xml or build.gradle
  ```


## Affected products

- io.ratpack:ratpack-groovy (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1
- io.ratpack:ratpack-java (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1
- io.ratpack:ratpack-session (Maven) ECOSYSTEM:introduced=0,fixed=1.6.1

## Identifiers

- CVE-2019-11808
- GHSA-54mg-vgrp-mwx9

## Related threats

- [Ratpack's default client side session signing key is highly predictable](https://junglewise.ai/threats/cve-2021-29480-ratpack-s-default-client-side-session-signing-key-is-highly)
- [Unencrypted storage of client side sessions](https://junglewise.ai/threats/cve-2021-29481-unencrypted-storage-of-client-side-sessions)