CVE-2017-8034 : Exploit Details and Defense Strategies
Learn about CVE-2017-8034, a privilege escalation vulnerability in Cloud Foundry allowing zone administrators to increase their privileges. Find out affected versions and mitigation steps.
CVE-2017-8034 addresses a privilege escalation vulnerability in Cloud Foundry that allows zone administrators to potentially increase their privileges in certain multi-zone UAA configurations.
Understanding CVE-2017-8034
What is CVE-2017-8034?
The vulnerability in Cloud Foundry's Cloud Controller and Router allows zone administrators to escalate their privileges by exploiting JSON Web Tokens (JWTs) obtained from UAA.
The Impact of CVE-2017-8034
The vulnerability could lead to unauthorized privilege escalation within multi-zone UAA configurations, potentially compromising the security of the system.
Technical Details of CVE-2017-8034
Vulnerability Description
Prior to specific versions of CAPI-release capi, Routing-release, and CF-release, the Cloud Controller and Router fail to authenticate the issuer on JWTs from UAA, enabling privilege escalation.
Affected Systems and Versions
- Product: Cloud Foundry
- Versions Affected: CAPI-release capi v1.32.0, Routing-release v0.159.0, CF-release v267
Exploitation Mechanism
The vulnerability allows zone administrators to exploit JWTs from UAA to gain unauthorized privileges in multi-zone UAA configurations.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade to the patched versions: CAPI-release capi v1.32.0, Routing-release v0.159.0, CF-release v267
- Monitor and restrict access to sensitive areas
Long-Term Security Practices
- Regularly review and update access control policies
- Conduct security training for administrators
Patching and Updates
Apply the necessary patches provided by Cloud Foundry to address the privilege escalation vulnerability.