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CVE-2021-32556

Estado: ModificadaBaja (3.3)—

It was discovered that the get_modified_conffiles() function in backends/packaging-apt-dpkg.py allowed injecting modified package names in a manner that would confuse the dpkg(1) call.

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)

Canonical — Apport

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-32556",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@ubuntu.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 3.8,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.3,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@ubuntu.com",
      "affectedData": [
        {
          "vendor": "Canonical",
          "product": "apport",
          "versions": [
            {
              "status": "affected",
              "version": "2.20.1",
              "lessThan": "2.20.1-0ubuntu2.30+esm1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.20.9",
              "lessThan": "2.20.9-0ubuntu7.24",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.20.11-0ubuntu27",
              "lessThan": "2.20.11-0ubuntu27.18",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.20.11-0ubuntu50",
              "lessThan": "2.20.11-0ubuntu50.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.20.11-0ubuntu65",
              "lessThan": "2.20.11-0ubuntu65.1",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "2.14.1-0ubuntu3",
              "lessThan": "2.14.1-0ubuntu3.29+esm7",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-06-12T04:15:12.390",
  "references": [
    {
      "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@ubuntu.com"
    },
    {
      "url": "https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@ubuntu.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "It was discovered that the get_modified_conffiles() function in backends/packaging-apt-dpkg.py allowed injecting modified package names in a manner that would confuse the dpkg(1) call."
    },
    {
      "lang": "es",
      "value": "Se ha detectado que la función get_modified_conffiles() en el archivo backends/packaging-apt-dpkg.py permitía inyectar nombres de paquetes modificados de forma que se confundía la llamada a dpkg(1)"
    }
  ],
  "lastModified": "2026-06-17T03:53:10.207",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndExcluding": "2.14.1-0ubuntu3.29\\+esm7",
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            },
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          ],
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  ],
  "sourceIdentifier": "security@ubuntu.com"
}