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CVE-2012-0920

Estado: ModificadaAlta (7.1)—

Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."

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 (2)

Debian — Debian LinuxDropbear SSH Project — Dropbear SSH

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2012-0920",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.1,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2012-06-05T22:55:09.437",
  "references": [
    {
      "url": "http://matt.ucc.asn.au/dropbear/CHANGES",
      "tags": [
        "Vendor Advisory"
      ],
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    },
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    },
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    {
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      "tags": [
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    },
    {
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    },
    {
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    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/73444",
      "tags": [
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    },
    {
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      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.mantor.org/~northox/misc/CVE-2012-0920.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to \"channels concurrency.\""
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de uso después de liberación vulnerabilidad en Dropbear SSH Server v0.52 a 2012.54 cuando la restricción de comandos y la autenticación de clave pública están habilitadas, lo permite a ejecutar código de su elección y eludir restricciones de comandos a usuarios remotos autenticados a través de múltiples peticiones hechas a mano, relacionados con la \"concurrencia de canales.\""
    }
  ],
  "lastModified": "2026-06-16T23:38:30.607",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8ECC61ED-602A-48B8-BB35-B21D2EB1009F",
              "versionEndIncluding": "2012.54",
              "versionStartIncluding": "0.52"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "036E8A89-7A16-411F-9D31-676313BB7244"
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}