CVE-2018-11047 : Vulnerability Insights and Analysis

Cloud Foundry UAA, versions 4.19 before 4.19.2, 4.12 before 4.12.4, 4.10 before 4.10.2, 4.7 before 4.7.6, and 4.5 before 4.5.7, have a vulnerability that allows unauthorized access to admin endpoints using refresh tokens instead of access tokens.

Understanding CVE-2018-11047

This CVE involves a security vulnerability in Cloud Foundry UAA that affects specific versions, potentially leading to unauthorized access to admin endpoints.

What is CVE-2018-11047?

The vulnerability in Cloud Foundry UAA versions 4.19, 4.12, 4.10, 4.7, and 4.5 allows unauthorized access to admin endpoints when a valid refresh token is used instead of an access token. This can extend the authentication period beyond the intended duration.

The Impact of CVE-2018-11047

The vulnerability enables unauthorized access to administrative endpoints such as /Users and /Groups within UAA. If certain actions like user deletion or group removal occur, the refresh token becomes invalid.

Technical Details of CVE-2018-11047

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Cloud Foundry UAA versions allows unauthorized access to admin endpoints by accepting refresh tokens instead of access tokens, extending the authentication period.

Affected Systems and Versions

Cloud Foundry UAA versions 4.19, 4.12, 4.10, 4.7, and 4.5 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by using valid refresh tokens to access admin endpoints, bypassing the need for access tokens.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2018-11047, follow these steps:

Immediate Steps to Take

Upgrade Cloud Foundry UAA to versions 4.19.2, 4.12.4, 4.10.2, 4.7.6, or 4.5.7 to mitigate the vulnerability.
Monitor and revoke refresh tokens regularly to prevent unauthorized access.

Long-Term Security Practices

Implement regular security audits and assessments to identify and address vulnerabilities promptly.
Educate users on best practices for token management and authentication security.

Patching and Updates

Stay informed about security updates and patches released by Cloud Foundry to address vulnerabilities like CVE-2018-11047.