CVE-2017-8034 Auth bypass in Cloud Foundry

Medium 6.6 Published 17 Jul 2017 Updated 5 Aug 2024

Zone administrators can escalate privileges in Cloud Foundry due to missing JWT issuer validation in multi-zone UAA configurations.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-8034?

CVE-2017-8034 is a medium-severity authentication bypass vulnerability in Cloud Foundry, published on 17 Jul 2017. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

The Cloud Controller and Router in Cloud Foundry (CAPI-release capi versions prior to v1.32.0, Routing-release versions prior to v0.159.0, CF-release versions prior to v267) do not validate the issuer on JSON Web Tokens (JWTs) from UAA. With certain multi-zone UAA configurations, zone administrators are able to escalate their privileges.

Weakness: CWE-565

Which versions are affected by CVE-2017-8034?

It affects 3 products.

Products include Cloudfoundry Capi-Release, Cloudfoundry Cf-Release, Cloudfoundry Routing-Release.

How do I fix CVE-2017-8034?

No fix has been published for CVE-2017-8034 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2017-8034 being exploited?

There is no known exploitation of CVE-2017-8034 in the wild and no public exploit code.

Sources

Also known as GHSA-47fq-mm42-6v8w.