CVE-2024-52280: SUSE Rancher Information Disclosure Flaw

CVE-2024-52280 Overview

CVE-2024-52280 is an information disclosure vulnerability in SUSE Rancher that allows authenticated users to watch Kubernetes resources they are not authorized to access. The flaw resides in the steve API aggregation layer used by Rancher. When a user holds generic permissions on a resource type, the authorization logic fails to enforce fine-grained restrictions on watch operations. Attackers with low-privileged accounts can subscribe to resource change streams and observe sensitive cluster data. The issue affects Rancher versions prior to commits 2175e09, 6e30359, and c744f0b.

Critical Impact
Low-privileged authenticated users can watch restricted Kubernetes resources across cluster boundaries, exposing confidential workload metadata and secrets referenced in observable objects.

Affected Products

SUSE Rancher versions before commit 2175e09
SUSE Rancher versions before commit 6e30359
SUSE Rancher versions before commit c744f0b

Discovery Timeline

2025-04-11 - CVE-2024-52280 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-52280

Vulnerability Analysis

The vulnerability is classified as [CWE-200] Exposure of Sensitive Information to an Unauthorized Actor. Rancher's steve API server provides a unified interface for watching Kubernetes resources across managed clusters. Watch operations create long-lived streams that emit events whenever monitored objects change state.

The authorization layer verifies that the requesting user has some permission on the target resource type but does not re-evaluate whether the user is authorized to view each individual object emitted through the stream. Users with narrow role bindings inherit broader visibility once a generic type-level permission is granted.

The exposed data can include workload configurations, environment variables, service definitions, and object references that reveal cluster topology. Because the stream operates over the network with low attack complexity, exploitation requires only valid Rancher credentials and knowledge of the target resource type.

Root Cause

The root cause lies in the permission check performed by the steve aggregation layer during watch subscription setup. The authorization logic evaluates access at the resource-type level rather than at the individual-object level. Once a user passes the coarse-grained check, the streaming API forwards all matching events without filtering entries that the user has no direct permission to see.

Attack Vector

An authenticated Rancher user with limited role bindings sends a watch request to the steve API for a resource type they hold generic permissions on. The server accepts the subscription and begins forwarding events for objects across the authorization boundary. The attacker collects sensitive metadata from the stream without triggering direct access-denied responses. No user interaction is required, and the scope changes from the caller's namespace to the broader cluster context.

No verified public exploit code is available. Refer to the GitHub Security Advisory GHSA-j5hq-5jcr-xwx7 for maintainer-provided technical details.

Detection Methods for CVE-2024-52280

Indicators of Compromise

Unusual volume of watch requests from low-privileged service accounts to the Rancher steve API
Long-lived WebSocket or HTTP streaming connections initiated by users lacking corresponding namespace-level RoleBindings
Audit log entries showing watch verbs on resource types where the caller has no matching per-object grants

Detection Strategies

Enable Kubernetes API audit logging and correlate watch verb events against effective RBAC role bindings for each user
Baseline the set of principals that legitimately watch each resource type, and alert on new principals initiating watch streams
Inspect Rancher access logs for accounts subscribing to resource types disproportionate to their assigned roles

Monitoring Recommendations

Ship Rancher and Kubernetes audit logs to a centralized analytics platform capable of joining identity context with API activity
Monitor for privilege drift and stale generic role bindings that grant broad type-level access
Track downstream credential use by service accounts whose tokens are exposed through watched objects

How to Mitigate CVE-2024-52280

Immediate Actions Required

Upgrade Rancher to a release that includes commits 2175e09, 6e30359, or c744f0b as documented in the SUSE Bug Report CVE-2024-52280
Audit RBAC bindings and remove overly broad generic permissions granted at the resource-type level
Rotate any credentials or tokens that may have been exposed through watchable objects such as Secrets, ConfigMaps, or Pod specs

Patch Information

SUSE has published fixes in the rancher/steve repository. Administrators should deploy Rancher builds that include the patched commits referenced in the GitHub Security Advisory GHSA-j5hq-5jcr-xwx7. Verify the running commit hash against the fixed versions before returning the environment to production.

Workarounds

Restrict Rancher user role bindings to namespace-scoped roles rather than cluster-scoped or type-generic grants until the patch is applied
Disable or limit API access for accounts that do not require watch capabilities on Kubernetes resources
Place the Rancher management API behind network controls that restrict which principals can initiate streaming connections

bash

# Verify the running Rancher steve commit against the patched revisions
kubectl -n cattle-system get deployment rancher -o jsonpath='{.spec.template.spec.containers[0].image}'

# Review cluster-wide role bindings that may grant generic watch permissions
kubectl get clusterrolebindings -o wide
kubectl auth can-i --list --as=<username>