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Use of Insufficiently Random Values in Apereo CAS

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 30, 2023

Package

maven org.apereo.cas:cas-server-core-services-api (Maven)

Affected versions

< 6.1.0-RC5

Patched versions

6.1.0-RC5
maven org.apereo.cas:cas-server-core-services-authentication (Maven)
< 6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-oauth-core-api (Maven)
< 6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-oidc (Maven)
< 6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-shell (Maven)
< 6.1.0-RC5
6.1.0-RC5
maven org.apereo.cas:cas-server-support-simple-mfa (Maven)
< 6.1.0-RC5
6.1.0-RC5

Description

Multiple classes used within Apereo CAS before release 6.1.0-RC5 makes use of apache commons-lang3 RandomStringUtils for token and ID generation which makes them predictable due to RandomStringUtils PRNG's algorithm not being cryptographically strong.

References

Published by the National Vulnerability Database Sep 23, 2019
Published to the GitHub Advisory Database May 24, 2022
Reviewed Nov 1, 2022
Last updated Jan 30, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.231%
(62nd percentile)

Weaknesses

CVE ID

CVE-2019-10754

GHSA ID

GHSA-g24w-373r-5pxg

Source code

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