CVE-2020-13775 : What You Need to Know

ZNC 1.8.0 up to 1.8.1-rc1 allows authenticated users to trigger an application crash (with a NULL pointer dereference) if echo-message is not enabled and there is no network.

Understanding CVE-2020-13775

ZNC 1.8.0 up to 1.8.1-rc1 vulnerability impacting authenticated users triggering an application crash.

What is CVE-2020-13775?

This CVE refers to a vulnerability in ZNC versions 1.8.0 up to 1.8.1-rc1 that allows authenticated users to cause an application crash by exploiting a NULL pointer dereference when echo-message is disabled and no network is present.

The Impact of CVE-2020-13775

The vulnerability can be exploited by authenticated users to crash the application, potentially leading to a denial of service (DoS) condition.

Technical Details of CVE-2020-13775

ZNC 1.8.0 up to 1.8.1-rc1 vulnerability details.

Vulnerability Description

Authenticated users can trigger an application crash with a NULL pointer dereference.

Affected Systems and Versions

ZNC versions 1.8.0 up to 1.8.1-rc1.

Exploitation Mechanism

Requires authentication and the absence of echo-message and network.

Mitigation and Prevention

Steps to address and prevent CVE-2020-13775.

Immediate Steps to Take

Enable echo-message in ZNC settings.
Ensure network connectivity is present.

Long-Term Security Practices

Regularly update ZNC to the latest version.
Implement proper authentication and access controls.

Patching and Updates

Apply patches provided by ZNC to fix the vulnerability.