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CVE-2020-28951

Estado: ModificadaCrítica (9.8)—

libuci in OpenWrt before 18.06.9 and 19.x before 19.07.5 may encounter a use after free when using malicious package names. This is related to uci_parse_package in file.c and uci_strdup in util.c.

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)

Openwrt — Openwrt

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-28951",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 10,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-11-19T19:15:12.017",
  "references": [
    {
      "url": "https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=commit%3Bh=5625f5bc36954d644cb80adf8de47854c65d91c3",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=log%3Bh=refs/tags/v18.06.9",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.openwrt.org/?p=project/uci.git%3Ba=commit%3Bh=a3e650911f5e6f67dcff09974df3775dfd615da6",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=commit%3Bh=5625f5bc36954d644cb80adf8de47854c65d91c3",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=log%3Bh=refs/tags/v18.06.9",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.openwrt.org/?p=project/uci.git%3Ba=commit%3Bh=a3e650911f5e6f67dcff09974df3775dfd615da6",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "libuci in OpenWrt before 18.06.9 and 19.x before 19.07.5 may encounter a use after free when using malicious package names. This is related to uci_parse_package in file.c and uci_strdup in util.c."
    },
    {
      "lang": "es",
      "value": "libuci en OpenWrt versiones anteriores a 18.06.9 y versiones 19.x anteriores a 19.07.5, puede encontrar un uso de la memoria previamente liberada cuando se utilizan nombres de paquetes maliciosos. Esto está relacionado a la función uci_parse_package en el archivo file.c y la función uci_strdup en el archivo util.c"
    }
  ],
  "lastModified": "2026-06-17T03:10:54.130",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0223495E-EE5D-4A90-81E3-B08AD96397C1",
              "versionEndExcluding": "18.06.9"
            },
            {
              "criteria": "cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "34C28E8A-2D8A-4536-A0ED-11E7A58F63EF",
              "versionEndExcluding": "19.07.5",
              "versionStartIncluding": "19.07.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}