Insecure Randomness Affecting io.ratpack:ratpack-session Open this link in a new tab package, versions [,1.6.1)

  • Attack Complexity


Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • snyk-id


  • published

    7 May 2019

  • disclosed

    7 May 2019

  • credit


How to fix?

Upgrade io.ratpack:ratpack-session to version 1.6.1 or higher.


io.ratpack:ratpack-session is a that allows supports for HTTP sessions within Ratpack applications.

Affected versions of this package are vulnerable to Insecure Randomness. Session IDs are generated using a weak PRNG within the ThreadLocalRandom class. An attacker could abuse this vulnerability to determine a small window for the server start time and obtain a session ID value. This vulnerability could be abused to theoretically determine the sequence of session IDs.