{
  "document": {
    "aggregate_severity": {
      "text": "High"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/oraclelinux6els/vex/2021/cve-2021-3606-els_os-oraclelinux6els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-06-13T02:26:59Z",
      "generator": {
        "date": "2026-06-13T02:26:59Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-3606-ELS_OS-ORACLELINUX6ELS",
      "initial_release_date": "2021-07-02T13:15:00Z",
      "revision_history": [
        {
          "date": "2021-07-02T13:15:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2025-11-29T11:17:54Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2025-12-23T22:15:38Z",
          "number": "3",
          "summary": "Update document"
        },
        {
          "date": "2026-06-13T02:26:59Z",
          "number": "4",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "4"
    },
    "title": "Security update on CVE-2021-3606"
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Oracle Linux 6",
                "product": {
                  "name": "Oracle Linux 6",
                  "product_id": "Oracle-Linux-6",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Oracle Linux"
          }
        ],
        "category": "vendor",
        "name": "Oracle Corporation"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                "product": {
                  "name": "openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                  "product_id": "openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/openvpn@2.4.9-1.el6.tuxcare.els2?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                "product": {
                  "name": "openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                  "product_id": "openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/openvpn@2.4.9-1.el6.tuxcare.els1?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                "product": {
                  "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                  "product_id": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/openvpn-devel@2.4.9-1.el6.tuxcare.els2?arch=x86_64"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                "product": {
                  "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                  "product_id": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/cloudlinux/openvpn-devel@2.4.9-1.el6.tuxcare.els1?arch=x86_64"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          }
        ],
        "category": "vendor",
        "name": "CloudLinux"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64 as a component of Oracle Linux 6",
          "product_id": "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64"
        },
        "product_reference": "openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
        "relates_to_product_reference": "Oracle-Linux-6"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64 as a component of Oracle Linux 6",
          "product_id": "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64"
        },
        "product_reference": "openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Oracle-Linux-6"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64 as a component of Oracle Linux 6",
          "product_id": "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64"
        },
        "product_reference": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64",
        "relates_to_product_reference": "Oracle-Linux-6"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64 as a component of Oracle Linux 6",
          "product_id": "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64"
        },
        "product_reference": "openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
        "relates_to_product_reference": "Oracle-Linux-6"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3606",
      "cwe": {
        "id": "CWE-427",
        "name": "Uncontrolled Search Path Element"
      },
      "notes": [
        {
          "category": "description",
          "text": "OpenVPN before version 2.5.3 on Windows allows local users to load arbitrary dynamic loadable libraries via an OpenSSL configuration file if present, which allows the user to run arbitrary code with the same privilege level as the main OpenVPN process (openvpn.exe).",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
          "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
          "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
          "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-3606"
        },
        {
          "category": "external",
          "summary": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606",
          "url": "https://community.openvpn.net/openvpn/wiki/CVE-2021-3606"
        },
        {
          "category": "external",
          "summary": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements",
          "url": "https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"
        }
      ],
      "release_date": "2021-07-02T13:15:00Z",
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
            "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "date": "2026-06-12T12:58:28.890625Z",
          "details": "Not affected: CVE-2021-3606 is specific to OpenVPN for Windows prior to 2.5.3 and relies on the Windows binary (openvpn.exe) auto-loading an OpenSSL configuration that enables arbitrary DLL loading; this behavior does not apply on Linux. In Linux VM or bare-metal deployments of OpenVPN 2.4.9, the Windows-specific executable and DLL search-path mechanism are absent, so the vulnerable code path is not reachable.",
          "product_ids": [
            "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:openvpn-0:2.4.9-1.el6.tuxcare.els2.x86_64",
            "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:openvpn-devel-0:2.4.9-1.el6.tuxcare.els2.x86_64"
          ]
        }
      ]
    }
  ]
}