CVE-2025-59391

{
  "id": "CVE-2025-59391",
  "sourceIdentifier": "[email protected]",
  "published": "2025-12-08T17:16:20.080",
  "lastModified": "2026-10-19T13:10:00.110",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de revelación de memoria en el analizador de configuración OSCORE de libcoap antes de la versión release-4.3.5-patches. Puede producirse una lectura fuera de límites al analizar ciertos valores de configuración, permitiendo a un atacante inferir o leer memoria más allá de los límites de las cadenas en la sección .rodata. Esto podría conducir potencialmente a la revelación de información o a la denegación de servicio."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-12-08T17:51:22.520390Z",
          "id": "CVE-2025-59391",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "4.3.5a",
              "matchCriteriaId": "8519F781-B2B5-48CA-BE86-B187221928B6"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/obgm/libcoap/pull/1730",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/obgm/libcoap/releases/tag/v4.3.5a",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    }
  ]
}