CVE-2017-8031 Explained : Impact and Mitigation
Learn about CVE-2017-8031 affecting Cloud Foundry Foundation cf-release and UAA versions, allowing authenticated users to revoke client tokens, potentially leading to a denial of service attack. Find mitigation steps and preventive measures.
A vulnerability has been identified in versions of Cloud Foundry Foundation cf-release prior to v279 and UAA versions 30.x prior to 30.6, 45.x prior to 45.4, and 52.x prior to 52.1. The vulnerability allows an authenticated user to invalidate client tokens of other users on the same client, potentially leading to a denial of service attack.
Understanding CVE-2017-8031
This CVE affects Cloud Foundry Foundation cf-release and UAA versions, potentially enabling a denial of service attack.
What is CVE-2017-8031?
CVE-2017-8031 is a vulnerability in Cloud Foundry Foundation cf-release and UAA versions that allows an authenticated user to revoke client tokens of other users on the same client.
The Impact of CVE-2017-8031
Exploitation of this vulnerability could result in a denial of service attack by a malicious actor, disrupting the normal operation of the affected systems.
Technical Details of CVE-2017-8031
This section provides technical details about the vulnerability.
Vulnerability Description
The UAA vulnerability allows an authenticated user of a specific client to invalidate client tokens belonging to other users of the same client, potentially leading to a denial of service attack.
Affected Systems and Versions
- Cloud Foundry Foundation cf-release: All versions prior to v279
- UAA: 30.x versions prior to 30.6, 45.x versions prior to 45.4, 52.x versions prior to 52.1
Exploitation Mechanism
The vulnerability occurs when the client uses opaque tokens or JWT tokens validated through the check_token endpoint, enabling the authenticated user to revoke client tokens of other users on the same client.
Mitigation and Prevention
To address CVE-2017-8031, follow these mitigation and prevention steps:
Immediate Steps to Take
- Upgrade Cloud Foundry Foundation cf-release to version v279 or higher
- Upgrade UAA to versions 30.6, 45.4, or 52.1, depending on the affected version
- Monitor and restrict user access to prevent unauthorized token revocation
Long-Term Security Practices
- Implement multi-factor authentication to enhance user verification
- Regularly review and update access control policies
- Conduct security training for users to recognize and report suspicious activities
Patching and Updates
- Apply patches and updates provided by Cloud Foundry Foundation to address the vulnerability