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CVE-2018-0502

Estado: ModificadaCrítica (9.8)—

Se ha descubierto un problema en versiones anteriores a la 5.6 de zsh. El comienzo de un archivo de script #! se gestionó de manera errónea, lo que podría conducir a una llamada execve a un programa nombrado en la segunda línea.

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)

Canonical — Ubuntu LinuxZSH — ZSH

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-0502",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/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": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "zsh before 5.6",
          "versions": [
            {
              "status": "affected",
              "version": "zsh before 5.6"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-09-05T08:29:00.230",
  "references": [
    {
      "url": "https://bugs.debian.org/908000",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html",
      "source": "security@debian.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201903-02",
      "tags": [
        "Third Party Advisory"
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      "source": "security@debian.org"
    },
    {
      "url": "https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://usn.ubuntu.com/3764-1/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://www.zsh.org/mla/zsh-announce/136",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://bugs.debian.org/908000",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://security.gentoo.org/glsa/201903-02",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://sourceforge.net/p/zsh/code/ci/1c4c7b6a4d17294df028322b70c53803a402233d",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://usn.ubuntu.com/3764-1/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.zsh.org/mla/zsh-announce/136",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in zsh before 5.6. The beginning of a #! script file was mishandled, potentially leading to an execve call to a program named on the second line."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en versiones anteriores a la 5.6 de zsh. El comienzo de un archivo de script #! se gestionó de manera errónea, lo que podría conducir a una llamada execve a un programa nombrado en la segunda línea."
    }
  ],
  "lastModified": "2026-06-17T01:31:01.780",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B"
            },
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              "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D"
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          ],
          "operator": "OR"
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    {
      "nodes": [
        {
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          "cpeMatch": [
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              "matchCriteriaId": "2E5C51F8-971A-4EC5-9254-B11F0E169BE5",
              "versionEndExcluding": "5.6"
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  ],
  "sourceIdentifier": "security@debian.org"
}