CVE-2025-7195 is a medium severity vulnerability affecting early versions of the operator-framework's Operator-SDK prior to 0.15.2. The root cause is an insecure user_setup script used during container image build time, which sets the /etc/passwd file permissions to 664 (group-writable) and assigns group ownership to root (gid=0). This permission setting is insecure because it allows any user within the root group inside the container to modify /etc/passwd. Since /etc/passwd controls user account information, an attacker with command execution inside the container as a non-root user but belonging to the root group can add new user entries with arbitrary user IDs, including UID 0, which corresponds to root privileges. This results in a privilege escalation vulnerability within the container environment. The vulnerability requires that the attacker already has some level of command execution inside the container and that the container is running with a random UID but still has the insecure /etc/passwd permissions. The CVSS 3.1 score is 6.4, reflecting a medium severity with local attack vector, high attack complexity, and requiring high privileges but no user interaction. The vulnerability impacts the confidentiality, integrity, and availability of the containerized application by enabling unauthorized privilege escalation. No public exploits have been reported yet, but the risk remains significant for affected deployments. The vulnerability primarily affects container images built using Operator-SDK versions before 0.15.2 that still use the insecure user_setup script. Remediation involves upgrading to Operator-SDK 0.15.2 or later, which removes or fixes the insecure script, and auditing existing container images for improper /etc/passwd permissions. Organizations should also review container runtime security policies and restrict group memberships to minimize risk.

The vulnerability allows an attacker with command execution inside a container to escalate privileges to root by modifying /etc/passwd due to insecure file permissions. This can lead to full control over the container environment, enabling the attacker to execute arbitrary code with root privileges, potentially compromising sensitive data, altering application behavior, or disrupting service availability. In multi-tenant Kubernetes clusters, compromised operators can be leveraged to attack other workloads or the cluster itself, increasing the risk of lateral movement and broader infrastructure compromise. The impact extends to confidentiality, integrity, and availability of containerized applications and potentially the underlying Kubernetes infrastructure if the compromised operator has cluster-level permissions. Organizations relying on Operator-SDK to build Kubernetes operators are at risk, especially if they deploy containers with the vulnerable image configurations. Although exploitation requires some level of access inside the container, the ease of privilege escalation once inside makes this a significant threat. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the potential for future attacks.

1. Upgrade all Operator-SDK usage to version 0.15.2 or later, which addresses the insecure user_setup script and corrects /etc/passwd permissions. 2. Audit existing container images built with Operator-SDK versions prior to 0.15.2 to identify those using the insecure user_setup script and rebuild them with corrected permissions. 3. Avoid running containers with group ownerships or permissions that allow group-writable access to sensitive files like /etc/passwd. 4. Implement strict container security policies that limit group memberships, especially avoiding root group membership for non-root users inside containers. 5. Use container image scanning tools to detect insecure file permissions and known vulnerable Operator-SDK versions in images before deployment. 6. Enforce the principle of least privilege for container users and operators, minimizing the ability of non-root users to gain elevated privileges. 7. Monitor container runtime environments for unusual modifications to /etc/passwd or unexpected user additions. 8. Educate development and DevOps teams about secure container build practices and the risks of modifying system files with insecure permissions during image builds.