CVE-2024-58259: Github.com/rancher/rancher Denial of Service Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4h45-jpvh-6p5j",
  "modified" : "2025-08-29T15:38:23Z",
  "published" : "2025-08-29T15:38:23Z",
  "aliases" : [ "CVE-2024-58259" ],
  "summary" : "Rancher affected by unauthenticated Denial of Service",
  "details" : "### Impact\nA vulnerability has been identified within Rancher Manager in which it did not enforce request body size limits on certain public (unauthenticated) and authenticated API endpoints. This allows a malicious user to exploit this by sending excessively large payloads, which are fully loaded into memory during processing. This could result in:\n- Denial of Service (DoS): The server process may crash or become unresponsive when memory consumption exceeds available resources.\n- Unauthenticated and authenticated exploitation: While the issue was initially observed in unauthenticated `/v3-public/*` endpoints, the absence of request body size limits also affected several authenticated APIs, broadening the potential attack surface. It's worth noting that other areas in Rancher do implement safeguards: requests proxied to Kubernetes APIs are subject to built-in size limits enforced by the [Kubernetes API server itself](https://github.com/kubernetes/kubernetes/blob/v1.33.4/staging/src/k8s.io/apiserver/pkg/server/config.go#L465), and Norman-based endpoints parse input with [predefined size caps](https://github.com/rancher/norman/blob/41dfae2f1a640c5ac9304e8b51e45a0f52cbdbb9/parse/read_input.go#L20-L31). However, the absence of similar protections in other Rancher APIs increased the risk of denial-of-service (DoS) scenarios in certain contexts.\n\nBy sending large binary or text payloads to vulnerable endpoints, a malicious actor could disrupt Rancher’s availability, impacting both administrative and user operations across managed clusters.\n \nPlease consult the associated  [MITRE ATT&CK - Technique - Network Denial of Service](https://attack.mitre.org/techniques/T1498/) for further information about this category of attack.\n\n### Patches\nThis vulnerability is addressed by adding a default limit of `1MiB` and a setting in case this value needs to be increased.\n\nPatched versions of Rancher include releases `v2.12.1`, `v2.11.5`, `v2.10.9` and `v2.9.12`.\n\n### Workarounds\nIf you can't upgrade to a fixed version, please make sure that you are manually setting the request body size limits. For example, using nginx-ingress controller and only allowing requests via the ingress. For reference on how to configure the limit manually, please consult the [Knowledge Base](https://www.suse.com/support/kb/doc/?id=000021309).\n\n### References\nIf you have any questions or comments about this advisory:\n- Reach out to the [SUSE Rancher Security team](https://github.com/rancher/rancher/security/policy) for security related inquiries.\n- Open an issue in the [Rancher](https://github.com/rancher/rancher/issues/new/choose) repository.\n- Verify with our [support matrix](https://www.suse.com/suse-rancher/support-matrix/all-supported-versions/) and [product support lifecycle](https://www.suse.com/lifecycle/).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.12.0"
      }, {
        "fixed" : "2.12.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.11.0"
      }, {
        "fixed" : "2.11.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.10.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0"
      }, {
        "fixed" : "2.9.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/rancher/rancher"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20250813072957-aee95d4e2a41"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/security/advisories/GHSA-4h45-jpvh-6p5j"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/commit/aee95d4e2a41ba2df6f88c9634d4fe1f42dee4d9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/rancher/rancher"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/releases/tag/v2.10.9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/releases/tag/v2.11.5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/releases/tag/v2.12.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rancher/rancher/releases/tag/v2.9.11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-08-29T15:38:23Z",
    "nvd_published_at" : null
  }
}