CVE-2020-16127 (GCVE-0-2020-16127)

Vulnerability from cvelistv5 – Published: 2020-11-11 04:10 – Updated: 2024-09-16 17:58
VLAI?
Title
accountsservice .pam_environment infinite loop
Summary
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.
Severity ?
2.8 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Freedesktop accountsservice Affected: 0.6.35-0ubuntu7.3 , < 0.6.35-0ubuntu7.3+esm2 (custom)
Affected: 0.6.40-2ubuntu11 , < 0.6.40-2ubuntu11.6 (custom)
Affected: 0.6.45-1ubuntu1 , < 0.6.45-1ubuntu1.3 (custom)
Affected: 0.6.55-0ubuntu , < 0.6.55-0ubuntu12~20.04.4 (custom)
Affected: 0.6.55-0ubuntu13 , < 0.6.55-0ubuntu13.2 (custom)
Create a notification for this product.
Credits
Kevin Backhouse
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T13:37:53.922Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "accountsservice",
          "vendor": "Freedesktop",
          "versions": [
            {
              "lessThan": "0.6.35-0ubuntu7.3+esm2",
              "status": "affected",
              "version": "0.6.35-0ubuntu7.3",
              "versionType": "custom"
            },
            {
              "lessThan": "0.6.40-2ubuntu11.6",
              "status": "affected",
              "version": "0.6.40-2ubuntu11",
              "versionType": "custom"
            },
            {
              "lessThan": "0.6.45-1ubuntu1.3",
              "status": "affected",
              "version": "0.6.45-1ubuntu1",
              "versionType": "custom"
            },
            {
              "lessThan": "0.6.55-0ubuntu12~20.04.4",
              "status": "affected",
              "version": "0.6.55-0ubuntu",
              "versionType": "custom"
            },
            {
              "lessThan": "0.6.55-0ubuntu13.2",
              "status": "affected",
              "version": "0.6.55-0ubuntu13",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Kevin Backhouse"
        }
      ],
      "datePublic": "2020-11-03T00:00:00.000Z",
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 2.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-11-11T04:10:15.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"
        }
      ],
      "source": {
        "advisory": "https://usn.ubuntu.com/usn/usn-4616-1",
        "defect": [
          "https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1900255"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "accountsservice .pam_environment infinite loop",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2020-11-03T00:00:00.000Z",
          "ID": "CVE-2020-16127",
          "STATE": "PUBLIC",
          "TITLE": "accountsservice .pam_environment infinite loop"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "accountsservice",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "0.6.35-0ubuntu7.3",
                            "version_value": "0.6.35-0ubuntu7.3+esm2"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "0.6.40-2ubuntu11",
                            "version_value": "0.6.40-2ubuntu11.6"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "0.6.45-1ubuntu1",
                            "version_value": "0.6.45-1ubuntu1.3"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "0.6.55-0ubuntu",
                            "version_value": "0.6.55-0ubuntu12~20.04.4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "0.6.55-0ubuntu13",
                            "version_value": "0.6.55-0ubuntu13.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Freedesktop"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Kevin Backhouse"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "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."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 2.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-20 Improper Input Validation"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS",
              "refsource": "MISC",
              "url": "https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS"
            }
          ]
        },
        "source": {
          "advisory": "https://usn.ubuntu.com/usn/usn-4616-1",
          "defect": [
            "https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1900255"
          ],
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2020-16127",
    "datePublished": "2020-11-11T04:10:15.512Z",
    "dateReserved": "2020-07-29T00:00:00.000Z",
    "dateUpdated": "2024-09-16T17:58:49.219Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.