CVE-2024-58260

Rancher update on users can deny the service to the admin

A vulnerability has been identified within Rancher Manager where a missing server-side validation on the .username field in Rancher can allow users with update permissions on other User resources to cause denial of access for targeted accounts. Specifically:

• Username takeover: A user with permission to update another user’s resource can set its .username to "admin", preventing both the legitimate admin and the affected user from logging in, as Rancher enforces uniqueness at login time.
• Account lockout: A user with update permissions on the admin account can change the admin’s username, effectively blocking administrative access to the Rancher UI.

This issue enables a malicious or compromised account with elevated update privileges on User resources to disrupt platform administration and user authentication.

Note: The users with these permissions to modify accounts and resources are considered as privileged users. For more information, please consult Rancher Manger’s documentation about global permissions.

Please consult the associated MITRE ATT&CK - Technique - Account Access Removal for further information about this category of attack.

The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions. Typical impact: unauthorized data access or execution of privileged operations.

CVE-2024-58260 has a CVSS score of 7.6 (High). The vector is network-reachable, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.12.2, 2.11.6, 2.10.10, 2.9.12); upgrading removes the vulnerable code path.

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This vulnerability is addressed by adding a new check in the webhook which blocks modifying usernames after it has been set. If it's empty then the username can be set to a username not already in use, but after that it is immutable.

Patched versions of Rancher include releases v2.12.2, v2.11.6, v2.10.10 and v2.9.12.

1. What is CVE-2024-58260? CVE-2024-58260 is a high-severity incorrect authorization vulnerability in github.com/rancher/rancher (go), affecting versions >= 2.12.0, < 2.12.2. It is fixed in 2.12.2, 2.11.6, 2.10.10, 2.9.12. The application does not correctly enforce access controls, allowing a principal to access resources or operations beyond their granted permissions.
2. How severe is CVE-2024-58260? CVE-2024-58260 has a CVSS score of 7.6 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of github.com/rancher/rancher are affected by CVE-2024-58260? github.com/rancher/rancher (go) versions >= 2.12.0, < 2.12.2 is affected.
4. Is there a fix for CVE-2024-58260? Yes. CVE-2024-58260 is fixed in 2.12.2, 2.11.6, 2.10.10, 2.9.12. Upgrade to this version or later.
5. Is CVE-2024-58260 exploitable, and should I be worried? Whether CVE-2024-58260 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2024-58260 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2024-58260?
   • Upgrade github.com/rancher/rancher to 2.12.2 or later
   • Upgrade github.com/rancher/rancher to 2.11.6 or later
   • Upgrade github.com/rancher/rancher to 2.10.10 or later
   • Upgrade github.com/rancher/rancher to 2.9.12 or later

Other vulnerabilities in github.com/rancher/rancher