Insecure Randomness Affecting org.apereo.cas:cas-server-support-simple-mfa package, versions [,6.1.0-RC5)


0.0
high

Snyk CVSS

    Exploit Maturity Proof of concept
    Attack Complexity Low
    Confidentiality High
    Integrity High
Expand this section
NVD
8.1 high

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  • Snyk ID SNYK-JAVA-ORGAPEREOCAS-467402
  • published 20 Sep 2019
  • disclosed 20 Sep 2019
  • credit Jonathan Leitschuh

How to fix?

Upgrade org.apereo.cas:cas-server-support-simple-mfa to version 6.1.0-RC5 or higher.

Overview

org.apereo.cas:cas-server-support-simple-mfa is an is package that allows Apereo CAS to act as a multifactor authentication provider on its own, issuing tokens and sending them to end-users via pre-defined communication channels such as email or text messages.

Affected versions of this package are vulnerable to Insecure Randomness. A insecure source of randomness is used to generate all of its random values as it relies upon apache commons lang3 RandomStringUtils. This could allow an attacker to possibly generate their own unique Ticket ID due to insufficient randomness.