CVE-2017-4970 Auth bypass in Cloud Foundry
A regression in the Staticfile buildpack disables basic authentication for misconfigured applications, allowing unauthorized access to protected resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-4970?
CVE-2017-4970 is a medium-severity authentication bypass vulnerability in Cloud Foundry, published on 13 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Cloud Foundry Foundation cf-release v255 and Staticfile buildpack versions v1.4.0 - v1.4.3. A regression introduced in the Static file build pack causes the Staticfile.auth configuration to be ignored when the Static file file is not present in the application root. Applications containing a Staticfile.auth file but not a Static file had their basic auth turned off when an operator upgraded the Static file build pack in the foundation to one of the vulnerable versions. Note that Static file applications without a Static file are technically misconfigured, and will not successfully detect unless the Static file build pack is explicitly specified.
Which versions are affected by CVE-2017-4970?
It affects 2 products.
Products include Cloudfoundry Cf-Release, Cloudfoundry Staticfile Buildpack.
How do I fix CVE-2017-4970?
No fix has been published for CVE-2017-4970 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-2017-4970 being exploited?
There is no known exploitation of CVE-2017-4970 in the wild and no public exploit code.
Other vulnerabilities in Cloud Foundry
- CVE-2015-5171 Cloud Foundry Runtime Insufficient Session Expiration vulnerability
- CVE-2015-5172 Cloud Foundry Runtime has Weak Password Recovery Mechanism for Forgotten Password
- CVE-2016-8218 Auth bypass in Cloud Foundry
- CVE-2017-4992 Cloud Foundry UAA privilege escalation with user invitations
- CVE-2016-6658 Information disclosure in n/a
Sources
Also known as GHSA-xvcr-4h4q-m7m8.