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CVE-2024-1930

Estado: AnalizadaMedia (6.5)—

No Limit on Number of Open Sessions / Bad Session Close Behaviour in dnf5daemon-server before 5.1.17 allows a malicious user to impact Availability via No Limit on Number of Open Sessions.

There is no limit on how many sessions D-Bus clients may create using the `open_session()` D-Bus method. For each session a thread is created in dnf5daemon-server. This spends a couple of hundred megabytes of memory in the process. Further connections will become impossible, likely because no more threads can be spawned by the D-Bus service.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Rpm-software-management — Dnf5

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-1930",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-1930",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-05-08T14:47:09.395902Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "patrick@puiterwijk.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2
      }
    ]
  },
  "affected": [
    {
      "source": "patrick@puiterwijk.org",
      "affectedData": [
        {
          "vendor": "Fedora",
          "product": "dnf5daemon-server",
          "versions": [
            {
              "status": "affected",
              "version": "5.1.16<="
            }
          ],
          "platforms": [
            "Linux"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:fedora:dnf5daemon-server:*:*:*:*:*:*:*:*"
          ],
          "vendor": "fedora",
          "product": "dnf5daemon-server",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "5.1.17",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-05-08T02:15:09.503",
  "references": [
    {
      "url": "https://www.openwall.com/lists/oss-security/2024/03/04/2",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "patrick@puiterwijk.org"
    },
    {
      "url": "https://www.openwall.com/lists/oss-security/2024/03/04/2",
      "tags": [
        "Exploit",
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "patrick@puiterwijk.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "No Limit on Number of Open Sessions / Bad Session Close Behaviour  in dnf5daemon-server before 5.1.17 allows a malicious user to impact Availability via No Limit on Number of Open Sessions.\n\nThere is no limit on how many sessions D-Bus clients may create using the `open_session()` D-Bus method. For each session a thread is created in dnf5daemon-server. This spends a couple of hundred megabytes of memory in the process. Further connections will become impossible, likely because no more threads can be spawned by the D-Bus service.\n\n"
    },
    {
      "lang": "es",
      "value": "Sin límite en el número de sesiones abiertas / mal comportamiento de cierre de sesión en dnf5daemon-server anterior a 5.1.17 permite que un usuario malintencionado afecte la disponibilidad mediante Sin límite en el número de sesiones abiertas. No hay límite en la cantidad de sesiones que los clientes D-Bus pueden crear usando el método D-Bus `open_session()`. Para cada sesión se crea un hilo en dnf5daemon-server. Esto gasta un par de cientos de megabytes de memoria en el proceso. Será imposible realizar más conexiones, probablemente porque el servicio D-Bus no puede generar más subprocesos."
    }
  ],
  "lastModified": "2026-06-17T07:05:26.267",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rpm-software-management:dnf5:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "011EF61C-CD6B-48B4-8E4B-EC5E3C9841AB",
              "versionEndExcluding": "5.1.17"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org"
}