CVE-2019-17598 : Security Advisory and Response

Lightbend Play Framework versions 2.5.x through 2.6.23 may expose proxy credentials when sending requests through an authenticated HTTP proxy.

Understanding CVE-2019-17598

This CVE identifies a vulnerability in the Lightbend Play Framework that could lead to the exposure of proxy credentials.

What is CVE-2019-17598?

This CVE pertains to a flaw in versions 2.5.x through 2.6.23 of the Lightbend Play Framework, where play-ws may inadvertently disclose proxy credentials to the target host under specific conditions.

The Impact of CVE-2019-17598

The vulnerability could potentially result in the exposure of sensitive proxy credentials, compromising the security and confidentiality of the network traffic.

Technical Details of CVE-2019-17598

The technical aspects of the CVE provide insight into the specific vulnerability and its implications.

Vulnerability Description

The issue arises when the Play Framework is configured to use an authenticated HTTP proxy, potentially revealing proxy credentials during high load periods when connecting to a target host via HTTPS.

Affected Systems and Versions

Lightbend Play Framework versions 2.5.x through 2.6.23

Exploitation Mechanism

The exposure of proxy credentials occurs when play-ws connects to a target host through HTTPS, especially during intense activity.

Mitigation and Prevention

Addressing the CVE involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Disable or reconfigure the use of authenticated HTTP proxies in the Play Framework settings.
Monitor network traffic for any unauthorized access or unusual behavior.

Long-Term Security Practices

Regularly update the Play Framework to the latest secure version.
Implement secure coding practices to prevent similar vulnerabilities in the future.

Patching and Updates

Apply patches or updates provided by Lightbend to mitigate the vulnerability and enhance security measures.