{
  "id": "CVE-2020-16127",
  "sourceIdentifier": "security@ubuntu.com",
  "published": "2020-11-11T04:15:12.177",
  "lastModified": "2020-11-24T19:50:07.023",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location."
    },
    {
      "lang": "es",
      "value": "Una modificaci\u00f3n espec\u00edfica de Ubuntu para AccountsService en versiones anteriores a 0.6.55-0ubuntu13.2, entre otras versiones anteriores, llevar\u00eda a cabo operaciones de lectura ilimitadas en archivos ~/.pam_environment controlados por el usuario, permitiendo un bucle infinito si /dev/zero est\u00e1 enlazado simb\u00f3licamente a esta ubicaci\u00f3n"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      },
      {
        "source": "security@ubuntu.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW",
          "baseScore": 2.8,
          "baseSeverity": "LOW"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1
        },
        "baseSeverity": "LOW",
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ]
    },
    {
      "source": "security@ubuntu.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:freedesktop:accountsservice:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "0.6.55",
              "matchCriteriaId": "9A297546-6EAD-40F9-819E-E3604CF93964"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS",
      "source": "security@ubuntu.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ]
}