A flaw was found in OpenShift Container Platform, versions 3.11 and later, in which the CSRF tokens used in the cluster console component were found to remain static during a users session. An attacker with the ability to observe the value of this token would be able to re-use the token to perform a CSRF attack.
Weakness
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
Affected Software
| Name |
Vendor |
Start Version |
End Version |
| Openshift_container_platform |
Redhat |
3.11 (including) |
3.11 (including) |
| Openshift_container_platform |
Redhat |
4.1 (including) |
4.1 (including) |
| Red Hat OpenShift Container Platform 3.11 |
RedHat |
openshift3/ose-console:v3.11.157-1 |
* |
| Red Hat OpenShift Container Platform 4.1 |
RedHat |
openshift4/ose-console:v4.1.16-201909100604 |
* |
| Red Hat OpenShift Container Platform 4.2 |
RedHat |
openshift4/ose-console:v4.2.0-201910101614 |
* |
Potential Mitigations
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, use anti-CSRF packages such as the OWASP CSRFGuard. [REF-330]
- Another example is the ESAPI Session Management control, which includes a component for CSRF. [REF-45]
- Use the “double-submitted cookie” method as described by Felten and Zeller:
- When a user visits a site, the site should generate a pseudorandom value and set it as a cookie on the user’s machine. The site should require every form submission to include this value as a form value and also as a cookie value. When a POST request is sent to the site, the request should only be considered valid if the form value and the cookie value are the same.
- Because of the same-origin policy, an attacker cannot read or modify the value stored in the cookie. To successfully submit a form on behalf of the user, the attacker would have to correctly guess the pseudorandom value. If the pseudorandom value is cryptographically strong, this will be prohibitively difficult.
- This technique requires Javascript, so it may not work for browsers that have Javascript disabled. [REF-331]
References