{
  "document": {
    "aggregate_severity": {
      "text": "MEDIUM"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "GREEN",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "publisher": {
      "category": "vendor",
      "name": "Open-Xchange GmbH",
      "namespace": "https://open-xchange.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical CSAF document",
        "url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2024/oxdc-adv-2024-0002.json"
      },
      {
        "category": "self",
        "summary": "Markdown representation",
        "url": "https://documentation.open-xchange.com/dovecot/security/advisories/md/2024/oxdc-adv-2024-0002.md"
      },
      {
        "category": "self",
        "summary": "HTML representation",
        "url": "https://documentation.open-xchange.com/dovecot/security/advisories/html/2024/oxdc-adv-2024-0002.html"
      },
      {
        "category": "self",
        "summary": "Plain-text representation",
        "url": "https://documentation.open-xchange.com/dovecot/security/advisories/txt/2024/oxdc-adv-2024-0002.txt"
      }
    ],
    "title": "OX Dovecot Pro Security Advisory OXDC-ADV-2024-0002",
    "tracking": {
      "current_release_date": "2024-09-10T00:00:00+00:00",
      "generator": {
        "date": "2024-09-10T14:33:29+00:00",
        "engine": {
          "name": "OX CSAF",
          "version": "1.0.0"
        }
      },
      "id": "OXDC-ADV-2024-0002",
      "initial_release_date": "2024-09-10T00:00:00+02:00",
      "revision_history": [
        {
          "date": "2024-09-10T00:00:00+02:00",
          "number": "1",
          "summary": "Initial release"
        },
        {
          "date": "2024-09-10T00:00:00+02:00",
          "number": "2",
          "summary": "Public release"
        },
        {
          "date": "2024-09-10T00:00:00+02:00",
          "number": "3",
          "summary": "Public release"
        },
        {
          "date": "2024-09-10T00:00:00+00:00",
          "number": "4",
          "summary": "Public release"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "2.3.21",
                "product": {
                  "name": "OX Dovecot Pro core 2.3.21",
                  "product_id": "OXDC-CORE_2.3.21",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:open-xchange:dovecot:2.3.21:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "2.3.21.1",
                "product": {
                  "name": "OX Dovecot Pro core 2.3.21.1",
                  "product_id": "OXDC-CORE_2.3.21.1",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:open-xchange:dovecot:2.3.21.1:*:*:*:*:*:*:*"
                  }
                }
              },
              {
                "category": "product_version",
                "name": "3.0.0",
                "product": {
                  "name": "OX Dovecot Pro core 3.0.0",
                  "product_id": "OXDC-CORE_3.0.0",
                  "product_identification_helper": {
                    "cpe": "cpe:2.3:a:open-xchange:dovecot:3.0.0:*:*:*:*:*:*:*"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "OX Dovecot Pro core"
          }
        ],
        "category": "vendor",
        "name": "Open-Xchange GmbH"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-23184",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2024-01-30T22:55:25+01:00",
      "ids": [
        {
          "system_name": "JIRA OX Bug",
          "text": "DOV-6464"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue."
        }
      ],
      "product_status": {
        "first_fixed": [
          "OXDC-CORE_2.3.21.1",
          "OXDC-CORE_3.0.0"
        ],
        "last_affected": [
          "OXDC-CORE_2.3.21"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-08-30T11:32:20+02:00",
          "details": "One can implement restrictions on address headers on MTA component preceding Dovecot.",
          "product_ids": [
            "OXDC-CORE_2.3.21"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "OXDC-CORE_2.3.21"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "An external attacker can send specially crafted messages that consume target system resources and cause outage."
        },
        {
          "category": "exploit_status",
          "details": "No publicly available exploits are known."
        }
      ],
      "title": "Excessive CPU usage with a large number of address headers"
    }
  ]
}