CVE-2019-10755 : What You Need to Know

This CVE-2019-10755 article provides insights into a vulnerability affecting PAC4J for SAML Protocol, leading to predictable SAML identifiers due to insecure randomness.

Understanding CVE-2019-10755

What is CVE-2019-10755?

The vulnerability in SAML2Utils.java within PAC4J for SAML Protocol uses the RandomStringUtils class from apache commons-lang3, resulting in predictable SAML identifiers.

The Impact of CVE-2019-10755

The issue affects the 3.X version of pac4j-saml, making SAML identifiers vulnerable to exploitation due to the lack of cryptographically secure PRNG algorithm.

Technical Details of CVE-2019-10755

Vulnerability Description

The vulnerability arises from the use of the RandomStringUtils class, leading to predictable SAML identifiers.

Affected Systems and Versions

Product: PAC4J For SAML Protocol
Vendor: n/a
Versions Affected: All versions prior to version 4.0.0-RC1

Exploitation Mechanism

The problem stems from the insecure randomness in generating SAML identifiers, making them predictable and exploitable.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to version 4.0.0-RC1 or later to mitigate the vulnerability.
Monitor for any unauthorized access or unusual SAML identifier patterns.

Long-Term Security Practices

Implement strong cryptographic algorithms for generating identifiers.
Regularly update and patch software components to address security vulnerabilities.

Patching and Updates

Apply patches and updates provided by the vendor to ensure the security of SAML identifiers.