CVE-2019-3798 : Security Advisory and Response
Learn about CVE-2019-3798, an escalation of privileges vulnerability in Cloud Foundry's Cloud Controller API Release, allowing unauthorized users to increase their privileges by creating a client with a specific name.
The Cloud Controller API Release for Cloud Foundry, versions prior to 1.79.0, has a security issue that allows unauthorized users to escalate their privileges by creating a client with a specific name.
Understanding CVE-2019-3798
This CVE involves an escalation of privileges vulnerability in Cloud Foundry's Cloud Controller API Release.
What is CVE-2019-3798?
The vulnerability in Cloud Foundry's Cloud Controller API Release, versions before 1.79.0, enables unauthorized remote users to increase their privileges to match those of a victim by creating a client with a name matching the victim's unique identifier (GUID).
The Impact of CVE-2019-3798
- CVSS Score: 6 (Medium Severity)
- Attack Vector: Network
- Attack Complexity: High
- Privileges Required: High
- User Interaction: Required
- Confidentiality Impact: Low
- Integrity Impact: High
- Availability Impact: High
Technical Details of CVE-2019-3798
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises from improper authentication in validating user permissions within the Cloud Controller API Release.
Affected Systems and Versions
- Affected Product: CAPI-release
- Vendor: Cloud Foundry
- Affected Versions: All versions prior to 1.79.0
Exploitation Mechanism
The unauthorized user needs remote authentication and the ability to create UAA clients, along with knowledge of the victim's email linked to the foundation, to exploit this vulnerability.
Mitigation and Prevention
Protecting systems from CVE-2019-3798 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Cloud Foundry to version 1.79.0 or later to mitigate the vulnerability.
- Monitor and restrict client creation permissions within the Cloud Controller API.
Long-Term Security Practices
- Regularly review and update user permissions and access controls.
- Conduct security training to educate users on best practices to prevent privilege escalation.
Patching and Updates
- Apply security patches and updates promptly to ensure the latest security measures are in place.