CVE-2023-27593: Github.com/cilium/cilium Cilium-agent Container Can Access The Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4hc4-pgfx-3mrx",
  "modified" : "2023-03-17T21:38:36Z",
  "published" : "2023-03-17T18:20:46Z",
  "aliases" : [ "CVE-2023-27593" ],
  "summary" : "cilium-agent container can access the host via `hostPath` mount",
  "details" : "### Impact\n\nAn attacker with access to a Cilium agent pod can write to `/opt/cni/bin` due to a `hostPath` mount of that directory in the agent pod. By replacing the CNI binary with their own malicious binary and waiting for the creation of a new pod on the node, the attacker can gain access to the underlying node. \n\n### Patches\n\nThe issue has been fixed and is available on versions >=1.11.15, >=1.12.8, >=1.13.1.\n\n### Workarounds\n\n[Kubernetes RBAC](https://kubernetes.io/docs/reference/access-authn-authz/rbac/) should be used to deny users and service accounts `exec` access to Cilium agent pods.\n\nIn cases where a user requires `exec` access to Cilium agent pods, but should not have access to the underlying node, no workaround is possible.\n\n### References\n\n* [PR containing resolution](https://github.com/cilium/cilium/pull/24075)\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent and Form3 to prepare these mitigations. Special thanks to Anastasios Koutlis, Daniel Teixeira, and Magdalena Oczadly for their cooperation. \n\n### For more information\n\nIf you have any questions or comments about this advisory, please reach out on [Slack](https://docs.cilium.io/en/latest/community/community/#slack).\n\nAs usual, if you think you found a related vulnerability, we strongly encourage you to report security vulnerabilities to our private security mailing list: security@cilium.io - first, before disclosing them in any public forums. This is a private mailing list where only members of the Cilium internal security team are subscribed to, and is treated as top priority. ",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.11.15"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.12.0"
      }, {
        "fixed" : "1.12.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cilium/cilium"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.13.0"
      }, {
        "fixed" : "1.13.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/security/advisories/GHSA-4hc4-pgfx-3mrx"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-27593"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/pull/24075"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cilium/cilium"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/releases/tag/v1.11.15"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/releases/tag/v1.12.8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cilium/cilium/releases/tag/v1.13.1"
  }, {
    "type" : "WEB",
    "url" : "https://kubernetes.io/docs/reference/access-authn-authz/rbac"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-276" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-03-17T18:20:46Z",
    "nvd_published_at" : "2023-03-17T20:15:00Z"
  }
}