Insecure Randomness

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

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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.

Remediation

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

References

CVSS Score

8.1
high severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    Low
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    High
  • Integrity
    High
  • Availability
    None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C
Credit
Jonathan Leitschuh
CVE
CVE-2019-10754
CWE
CWE-338
Snyk ID
SNYK-JAVA-ORGAPEREOCAS-467402
Disclosed
20 Sep, 2019
Published
20 Sep, 2019