FKIE_CVE-2017-20002

Vulnerability from fkie_nvd - Published: 2021-03-17 06:15 - Updated: 2024-11-21 03:22
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM's nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges.
References
cve@mitre.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374Mailing List, Vendor Advisory
cve@mitre.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957Exploit, Mailing List, Vendor Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2021/03/msg00020.htmlMailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957Exploit, Mailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/03/msg00020.htmlMailing List, Vendor Advisory
Impacted products
Vendor Product Version
debian shadow 4.4
debian debian_linux 9.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:debian:shadow:4.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "C1317D10-D7BA-4A18-8667-7542A44A4989",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Debian shadow package before 1:4.5-1 for Shadow incorrectly lists pts/0 and pts/1 as physical terminals in /etc/securetty. This allows local users to login as password-less users even if they are connected by non-physical means such as SSH (hence bypassing PAM\u0027s nullok_secure configuration). This notably affects environments such as virtual machines automatically generated with a default blank root password, allowing all local users to escalate privileges."
    },
    {
      "lang": "es",
      "value": "El paquete shadow de Debian versiones anteriores a 4.5-1 para Shadow, enumera incorrectamente pts/0 y pts/1 como terminales f\u00edsicos en /etc/securetty.\u0026#xa0;Esto permite a usuarios locales iniciar sesi\u00f3n como usuarios sin contrase\u00f1a incluso si est\u00e1n conectados por medios no f\u00edsicos como SSH (por lo tanto, omitiendo una configuraci\u00f3n nullok_secure de PAM).\u0026#xa0;Esto afecta notablemente a entornos como las m\u00e1quinas virtuales generadas autom\u00e1ticamente con una contrase\u00f1a root en blanco predeterminada, permitiendo a todos los usuarios locales escalar privilegios"
    }
  ],
  "id": "CVE-2017-20002",
  "lastModified": "2024-11-21T03:22:25.583",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.6,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-03-17T06:15:12.107",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=877374"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914957"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00020.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-269"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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