CVE-2017-4970 : What You Need to Know
Learn about CVE-2017-4970, a vulnerability in Cloud Foundry Foundation that can disable basic authentication in misconfigured applications. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
This CVE involves a vulnerability in Cloud Foundry Foundation cf-release v255 and Staticfile buildpack versions v1.4.0 - v1.4.3 that can disable basic authentication in misconfigured applications.
Understanding CVE-2017-4970
This CVE highlights a specific issue in Cloud Foundry Foundation that affects the Staticfile buildpack versions v1.4.0 - v1.4.3.
What is CVE-2017-4970?
The vulnerability in this CVE allows basic authentication to be disabled in applications that are misconfigured within the Cloud Foundry Foundation environment.
The Impact of CVE-2017-4970
The vulnerability can lead to basic authentication being turned off in applications that have a specific misconfiguration, potentially affecting the security of these applications.
Technical Details of CVE-2017-4970
This section delves into the technical aspects of the CVE.
Vulnerability Description
The issue arises from a regression in the Staticfile build pack, causing the omission of the Staticfile.auth configuration when the Static file is absent in the application root.
Affected Systems and Versions
- Product: Cloud Foundry
- Versions: cf-release v255, Staticfile buildpack versions v1.4.0 - v1.4.3
Exploitation Mechanism
- When upgrading to vulnerable versions, applications with a Staticfile.auth file but no Static file will have basic authentication disabled.
- Misconfigured Static file applications without a Static file will not function correctly unless the Static file build pack is explicitly specified.
Mitigation and Prevention
In this section, we discuss the steps to mitigate and prevent the exploitation of CVE-2017-4970.
Immediate Steps to Take
- Operators should ensure that applications are correctly configured with the necessary files to avoid basic authentication issues.
- Regularly monitor and update the Staticfile build pack to patched versions to prevent vulnerabilities.
Long-Term Security Practices
- Conduct regular security audits to identify misconfigurations in applications.
- Educate developers and operators on best practices for configuring applications securely.
Patching and Updates
- Apply patches provided by Cloud Foundry Foundation to address the vulnerability.