CVE-2017-7528 : Security Advisory and Response

Red Hat CloudForms Management Engine 5 includes Ansible Tower, which has a security vulnerability known as CRLF Injection. Learn about the impact, technical details, and mitigation steps for CVE-2017-7528.

Understanding CVE-2017-7528

Red Hat CloudForms Management Engine 5 includes Ansible Tower, which has a security vulnerability known as CRLF Injection.

What is CVE-2017-7528?

CVE-2017-7528 is a security vulnerability in Ansible Tower, as shipped with Red Hat CloudForms Management Engine 5. It involves a CRLF Injection issue where the X-Forwarded-For header allows internal servers to deploy additional systems using a callback mechanism.

The Impact of CVE-2017-7528

The vulnerability has a CVSS base score of 5.2, with medium severity. It can lead to high integrity impact and low confidentiality impact, requiring high privileges for exploitation. The attack complexity is low, and it has an adjacent network attack vector.

Technical Details of CVE-2017-7528

Red Hat CloudForms Management Engine 5 with Ansible Tower is affected by the following:

Vulnerability Description

CRLF Injection vulnerability in Ansible Tower
X-Forwarded-For header allows internal servers to deploy additional systems

Affected Systems and Versions

Product: Ansible Tower
Vendor: Red Hat
Versions: As shipped with Red Hat CloudForms Management Engine 5

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Adjacent Network
Privileges Required: High
User Interaction: None

Mitigation and Prevention

It is crucial to take immediate steps and implement long-term security practices to mitigate the risks associated with CVE-2017-7528.

Immediate Steps to Take

Disable X-Forwarded-For header if not required
Monitor and restrict network traffic to prevent unauthorized access

Long-Term Security Practices

Regularly update and patch Ansible Tower and related systems
Conduct security audits and penetration testing to identify vulnerabilities

Patching and Updates

Apply patches and updates provided by Red Hat to address the CRLF Injection vulnerability in Ansible Tower.