CVE-2019-3818 : Security Advisory and Response

In Red Hat OpenShift Container Platform, the kube-rbac-proxy container (version prior to 0.4.1) has a vulnerability that allows the use of insecure ciphers and TLS 1.0, potentially enabling attackers to decrypt and manipulate traffic.

Understanding CVE-2019-3818

This CVE affects the kube-rbac-proxy container in Red Hat OpenShift Container Platform.

What is CVE-2019-3818?

The kube-rbac-proxy container (version prior to 0.4.1) in Red Hat OpenShift Container Platform does not properly consider TLS configurations, leading to the use of insecure ciphers and TLS 1.0, creating a potential security risk.

The Impact of CVE-2019-3818

The vulnerability allows attackers to potentially decrypt and manipulate traffic flowing through a TLS connection with weak configurations, compromising data integrity.

Technical Details of CVE-2019-3818

The technical aspects of the CVE.

Vulnerability Description

The kube-rbac-proxy container (version prior to 0.4.1) in Red Hat OpenShift Container Platform does not honor TLS configurations, allowing for the use of insecure ciphers and TLS 1.0.

Affected Systems and Versions

Product: kube-rbac-proxy
Vendor: [UNKNOWN]
Versions Affected: 0.4.1

Exploitation Mechanism

Attack Complexity: HIGH
Attack Vector: NETWORK
Privileges Required: NONE
User Interaction: NONE
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE
Vector String: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-3818.

Immediate Steps to Take

Update the kube-rbac-proxy container to version 0.4.1 or later.
Disable insecure ciphers and TLS 1.0 in the TLS configurations.

Long-Term Security Practices

Regularly monitor and update TLS configurations to ensure strong encryption standards.
Conduct security assessments to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches and updates provided by Red Hat to address the vulnerability.