Impact

A vulnerability has been identified which may lead to sensitive data being leaked into Rancher's audit logs. Rancher Audit Logging is an opt-in feature, only deployments that have it enabled and have AUDITLEVEL set to 1 or above are impacted by this issue.

The leaks might be caught in the audit logs upon these actions:

- Creating cloud credentials or new authentication providers. It is crucial to note that all authentication providers (such as AzureAD) and cloud providers (such as Google) are impacted. - Downloading a kubeconfig file from a downstream or a local cluster. - Logging in/out from Rancher.

The affected data may include the following:

- HTTP headers

Field | Location -- | -- X-Api-Auth-Header | Request header X-Api-Set-Cookie-Header | Response header X-Amz-Security-Token | Request header credentials | Request body applicationSecret | Request Body oauthCredential | Request Body serviceAccountCredential | Request Body spKey | Request Body spCert | Request body spCert | Response body certificate | Request body privateKey | Request body - API Server calls returning Secret objects (including sub-types, such as kubernetes.io/dockerconfigjson). - Raw command lines used by agents to connect to the Rancher server which expose sensitive information (e.g. register ... --token abc). - Kubeconfig contents when the 'Download KubeConfig' feature is used in the Rancher UI.

The patched versions will redact the sensitive data, replacing it with [redacted], making it safer for consumption. It is recommended that static secrets are rotated after the system is patched, to limit the potential impact of sensitive data being misused due to this vulnerability.

Note: 1. The severity of the vulnerability is intricately tied to the logging strategy employed. If logs are kept locally (default configuration), the impact is contained within the system, limiting the exposure. However, when logs are shipped to an external endpoint, the vulnerability's severity might increase, as resistance against leaks is contingent on the security measures implemented at the external log collector level. 2. The final impact severity for confidentiality, integrity and availability is dependent on the permissions that the leaked credentials have on their own services.

Patches Patched versions include releases 2.6.14, 2.7.10 and 2.8.2.

Workarounds If AUDITLEVEL 1 or above is required and you cannot update to a patched Rancher version, ensure that the log is handled appropriately and it is not shared with other users or shipped into a log ingestion solution without the appropriate RBAC enforcement. Otherwise, disabling the Audit feature or decreasing it to the audit level 0, mitigates the issue.

For more information

If you have any questions or comments about this advisory:

- Reach out to the SUSE Rancher Security team for security related inquiries. - Open an issue in the Rancher repository. - Verify with our support matrix and product support lifecycle.

Impact Multiple Cross-Site Scripting (XSS) vulnerabilities have been identified in the Rancher UI. Cross-Site scripting allows a malicious user to inject code that is executed within another user's browser, allowing the attacker to steal sensitive information, manipulate web content, or perform other malicious activities on behalf of the victims. This could result in a user with write access to the affected areas being able to act on behalf of an administrator, once an administrator opens the affected web page.

The affected areas include the Projects/Namespaces and Auth Provider sections. The attacker needs to be authenticated and have write access to those features in order to exploit the vulnerabilities. Some of the permissions (roles) required are:

- Project Owner. - Restricted Admin. - Configure Authentication. - Administrator. - Custom RBAC Role that provides write access on Projects or External Authentication Providers.

For users that suspect this vulnerability may have targeted their Rancher instance, we recommend rotating all API Keys and Kubeconfig tokens.

It's also advised to review logs and possibly rotate credentials stored as secrets in Rancher and downstream cluster, if you believe that users' credentials to access Rancher and its clusters might have been compromised.

Patches Patched versions include releases 2.6.13, 2.7.4 and later versions.

Workarounds There is no direct mitigation besides updating Rancher to a patched version.

Credits We would like to recognize and thank @bybit-sec for the responsible disclosure of this security issue.

For more information If you have any questions or comments about this advisory:

- Reach out to the SUSE Rancher Security team for security related inquiries. - Open an issue in the Rancher repository. - Verify with our support matrix and product support lifecycle.

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