CVE-2021-36783 Rancher: Failure to properly sanitize credentials in cluster template answers

What is CVE-2021-36783?

CVE-2021-36783 is a critical vulnerability in SUSE Rancher, published on 7 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A Insufficiently Protected Credentials vulnerability in SUSE Rancher allows authenticated Cluster Owners, Cluster Members, Project Owners and Project Members to read credentials, passwords and API tokens that have been stored in cleartext and exposed via API endpoints. This issue affects: SUSE Rancher Rancher versions prior to 2.6.4; Rancher versions prior to 2.5.13.

Weakness: CWE-522

Which versions are affected by CVE-2021-36783?

4 open source packages ship an affected version, including github.com/rancher/rancher. It affects 1 product.

Products include Suse Rancher.

How do I fix CVE-2021-36783?

Upgrade github.com/rancher/rancher to a fixed version for your release line: 2.5.13 or 2.6.4.

Is CVE-2021-36783 being exploited?

There is no known exploitation of CVE-2021-36783 in the wild and no public exploit code.

Other vulnerabilities in SUSE Rancher

• CVE-2023-22647 Rancher vulnerable to Privilege Escalation via manipulation of Secrets Critical 9.9
• CVE-2023-22651 Rancher Webhook is misconfigured during upgrade process Critical 9.9
• CVE-2022-43757 Rancher: Exposure of sensitive fields Critical 9.9
• CVE-2021-36782 Rancher: Plaintext storage and exposure of credentials in Rancher API and cluster.management.cattle.io object Critical 9.9
• CVE-2019-11202 Rancher Recreates Default User With Known Password Despite Deletion Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8w87-58w6-hfv8.