CVE-2020-24585 : What You Need to Know

An issue was discovered in the DTLS handshake implementation in wolfSSL before 4.5.0. Clear DTLS application_data messages in epoch 0 do not produce an out-of-order error. Instead, these messages are returned to the application.

Understanding CVE-2020-24585

This CVE identifies a vulnerability in the DTLS handshake implementation in wolfSSL before version 4.5.0.

What is CVE-2020-24585?

The vulnerability in the DTLS handshake implementation allows clear DTLS application_data messages in epoch 0 to bypass the out-of-order error, leading to these messages being returned to the application.

The Impact of CVE-2020-24585

The impact of this vulnerability could potentially allow an attacker to manipulate the DTLS application_data messages, compromising the integrity and security of the communication.

Technical Details of CVE-2020-24585

This section provides more technical insights into the vulnerability.

Vulnerability Description

The issue lies in the handling of DTLS application_data messages in epoch 0, which can be exploited to avoid error checks and deliver potentially malicious data.

Affected Systems and Versions

Affected: All versions of wolfSSL before 4.5.0

Exploitation Mechanism

The vulnerability can be exploited by sending crafted DTLS application_data messages in epoch 0 to the target system, bypassing error checks and potentially leading to unauthorized access or data manipulation.

Mitigation and Prevention

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

Immediate Steps to Take

Update wolfSSL to version 4.5.0 or later to mitigate the vulnerability
Monitor network traffic for any suspicious activity

Long-Term Security Practices

Regularly update and patch software to the latest versions
Implement network segmentation and access controls to limit exposure

Patching and Updates

Apply patches and updates provided by wolfSSL to ensure the security of the system