CVE-2023-6476: Github.com/cri o/cri o Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p4rx-7wvg-fwrc",
  "modified" : "2024-01-10T15:27:45Z",
  "published" : "2024-01-10T15:27:45Z",
  "aliases" : [ "CVE-2023-6476" ],
  "summary" : "CRI-O's pods can break out of resource confinement on cgroupv2",
  "details" : "### Impact\n_What kind of vulnerability is it? Who is impacted?_\nAll versions of CRI-O running on cgroupv2 nodes. \nUnchecked access to an experimental annotation allows a container to be unconfined. Back in 2021, [support was added](https://github.com/cri-o/cri-o/pull/4479) to support an experimental annotation that allows a user to request special resources in cgroupv2. It was supposed to be gated by an experimental annotation: `io.kubernetes.cri-o.UnifiedCgroup`, which was supposed to be filtered from the [list of allowed annotations](https://github.com/cri-o/cri-o/blob/main/pkg/config/workloads.go#L103-L107) . However, there is a bug in this code which allows any user to specify this annotation, regardless of whether it's enabled on the node. The consequences of this are a pod can specify any amount of memory/cpu and get it, circumventing the kubernetes scheduler, and potentially be able to DOS a node. \n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n1.29.1, 1.28.3, 1.27.3\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\nuse cgroupv1\n\n### References\n_Are there any links users can visit to find out more?_\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cri-o/cri-o"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.29.0"
      }, {
        "fixed" : "1.29.1"
      } ]
    } ],
    "versions" : [ "1.29.0" ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cri-o/cri-o"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.28.0"
      }, {
        "fixed" : "1.28.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/cri-o/cri-o"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.27.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cri-o/cri-o/security/advisories/GHSA-p4rx-7wvg-fwrc"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-6476"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cri-o/cri-o/pull/4479"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cri-o/cri-o/commit/75effcb1a25851a736e82dba1f7d8cee93ee159e"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2024:0195"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/errata/RHSA-2024:0207"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2023-6476"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2253994"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cri-o/cri-o"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cri-o/cri-o/blob/main/pkg/config/workloads.go#L103-L107"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-10T15:27:45Z",
    "nvd_published_at" : "2024-01-09T22:15:43Z"
  }
}