ghsa-9qq2-xhmc-h9qr
Vulnerability from github
Published
2021-06-23 17:57
Modified
2022-04-25 20:20
Severity ?
4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
Access Control Bypass
Details

An issue was discovered in Rancher 2 through 2.1.5. Any project member with access to the default namespace can mount the netes-default service account in a pod, and then use that pod to execute administrative privileged commands against the k8s cluster. This could be mitigated by isolating the default namespace in a separate project, where only cluster admins can be given permissions to access. As of 2018-12-20, this bug affected ALL clusters created or imported by Rancher.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/rancher/rancher"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-20321"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-288",
      "CWE-668"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-12T18:10:58Z",
    "nvd_published_at": "2019-04-10T14:29:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Rancher 2 through 2.1.5. Any project member with access to the default namespace can mount the netes-default service account in a pod, and then use that pod to execute administrative privileged commands against the k8s cluster. This could be mitigated by isolating the default namespace in a separate project, where only cluster admins can be given permissions to access. As of 2018-12-20, this bug affected ALL clusters created or imported by Rancher.",
  "id": "GHSA-9qq2-xhmc-h9qr",
  "modified": "2022-04-25T20:20:41Z",
  "published": "2021-06-23T17:57:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-20321"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rancher/rancher/commit/6ea187fcc2309d5a7a14ed47de5688bf6573f448"
    },
    {
      "type": "WEB",
      "url": "https://forums.rancher.com/c/announcements"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rancher/rancher"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rancher/rancher/releases/tag/v2.1.6"
    },
    {
      "type": "WEB",
      "url": "https://rancher.com/blog/2019/2019-01-29-explaining-security-vulnerabilities-addressed-in-rancher-v2-1-6-and-v2-0-11"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Access Control Bypass"
}


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