CVE-2018-16115 : What You Need to Know

Lightbend Akka 2.5.x versions prior to 2.5.16 are vulnerable to message disclosure and alteration due to an error in the random number generator (RNG) used in Akka Remoting framework.

Understanding CVE-2018-16115

This CVE highlights a vulnerability in Akka that could allow malicious actors to compromise communication by exploiting flaws in the random number generator.

What is CVE-2018-16115?

The vulnerability in Lightbend Akka 2.5.x versions allows for the disclosure and alteration of messages due to a bug in the random number generator implementation.

The Impact of CVE-2018-16115

The vulnerability could lead to eavesdropping, message replay, and message modification when using Akka Remoting/Cluster, potentially compromising communication integrity.

Technical Details of CVE-2018-16115

Lightbend Akka 2.5.x versions prior to 2.5.16 are affected by a flaw in the random number generator implementation.

Vulnerability Description

Akka Remoting framework utilizes a random number generator for TLS, which includes a bug causing generated numbers to repeat after a few bytes.
Custom RNGs like AES128CounterSecureRNG and AES256CounterSecureRNG, although not enabled by default, can be inadvertently promoted for use through documentation.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: All versions prior to 2.5.16

Exploitation Mechanism

Malicious actors can exploit the vulnerability by enabling custom RNGs in the configuration, allowing for message disclosure and alteration.

Mitigation and Prevention

Immediate Steps to Take

Disable custom RNGs like AES128CounterSecureRNG and AES256CounterSecureRNG if not required.
Update Akka to version 2.5.16 or newer to mitigate the vulnerability. Long-Term Security Practices
Regularly review and update Akka configurations to ensure secure settings.
Monitor for any unusual communication patterns that may indicate exploitation of the RNG vulnerability.
Educate users on secure configuration practices and discourage the use of custom RNGs.
Implement network monitoring and encryption to enhance communication security.
Stay informed about security updates and patches for Akka to address vulnerabilities effectively.

Patching and Updates

Ensure timely installation of security patches and updates provided by Lightbend to address the RNG vulnerability in Akka.