AppArmor bypass with symlinked /proc in runc

{
  "id": "ce4901db8e008ddf366eb7172fa966607086c72bdeb52dbfa332aaa7d933dfd9",
  "url": "https://osv.dev/vulnerability/CVE-2023-28642",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "AppArmor bypass with symlinked /proc in runc",
    "summary": "runc is a CLI tool for spawning and running containers according to the OCI specification. It was found that AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. This issue has been fixed in runc version 1.1.5, by prohibiting symlinked `/proc`. See PR #3785 for details. users are advised to upgrade. Users unable to upgrade should avoid using an untrusted container image.",
    "evidence": "osv:CVE-2023-28642",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-28642",
      "aliases": [
        "CVE-2023-28642",
        "GHSA-g2j6-57v7-gm8c",
        "GO-2023-1683"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/opencontainers/runc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f19387a6bec4944c770f7668ab51c4348d9c2f38"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.0",
            "v1.0.0-rc2",
            "v0.0.8",
            "v0.0.7",
            "v0.0.6",
            "v0.0.5",
            "v0.0.4",
            "v0.0.2",
            "v0.0.3",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28642.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.695106362Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28642.json",
        "https://github.com/opencontainers/runc/security/advisories/GHSA-g2j6-57v7-gm8c",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-28642",
        "https://security.netapp.com/advisory/ntap-20241206-0005/",
        "https://github.com/opencontainers/runc/pull/3785"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-281"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28642.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-28642",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506095,
  "published_at": "2023-03-29T18:15:48.957+00:00"
}