CVE-2019-20786 Explained : Impact and Mitigation

Pion DTLS prior to version 1.5.2 is vulnerable to a security issue that allows remote attackers to inject unencrypted data into the system.

Understanding CVE-2019-20786

This CVE involves a vulnerability in the handleIncomingPacket function in the conn.go file of Pion DTLS.

What is CVE-2019-20786?

The handleIncomingPacket function in Pion DTLS before version 1.5.2 lacks a verification for application data with epoch 0, enabling malicious remote attackers to introduce unencrypted data of their choice into the system post handshake completion.

The Impact of CVE-2019-20786

This vulnerability poses a risk of unauthorized data injection by remote attackers after the handshake process.

Technical Details of CVE-2019-20786

Pion DTLS version 1.5.2 and earlier are affected by this vulnerability.

Vulnerability Description

The handleIncomingPacket function in conn.go of Pion DTLS before version 1.5.2 does not include a verification for application data with epoch 0, allowing malicious remote attackers to inject unencrypted data into the system post handshake.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: Pion DTLS versions prior to 1.5.2

Exploitation Mechanism

The lack of verification for application data with epoch 0 in the handleIncomingPacket function enables remote attackers to inject unencrypted data into the system.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update Pion DTLS to version 1.5.2 or later to mitigate the vulnerability.
Monitor network traffic for any signs of unauthorized data injection.

Long-Term Security Practices

Regularly update and patch all software components to prevent security vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.
Conduct regular security assessments and penetration testing to identify and address security weaknesses.
Stay informed about security best practices and emerging threats to enhance overall cybersecurity posture.

Patching and Updates

Ensure timely installation of security patches and updates for all software components to address known vulnerabilities.