CVE-2018-6556 (GCVE-0-2018-6556)

Vulnerability from cvelistv5 – Published: 2018-08-10 15:00 – Updated: 2024-09-17 03:38
VLAI?
Title
The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files
Summary
lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.
Severity ?
No CVSS data available.
CWE
  • Incorrect access control
Assigner
References
Impacted products
Vendor Product Version
n/a LXC Affected: 2.0.9 , < 2.0* (custom)
Affected: 3.0.0 , < 3.0* (custom)
Date Public ?
2018-08-06 00:00
Credits
Matthias Gerstner from SUSE
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T06:10:10.096Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "USN-3730-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/usn/usn-3730-1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591"
          },
          {
            "name": "GLSA-201808-02",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201808-02"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=988348"
          },
          {
            "name": "openSUSE-SU-2019:1227",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html"
          },
          {
            "name": "openSUSE-SU-2019:1230",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html"
          },
          {
            "name": "openSUSE-SU-2019:1275",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html"
          },
          {
            "name": "openSUSE-SU-2019:1481",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "LXC",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "2.0*",
              "status": "affected",
              "version": "2.0.9",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "3.0.2",
                  "status": "unaffected"
                }
              ],
              "lessThan": "3.0*",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Matthias Gerstner from SUSE"
        }
      ],
      "datePublic": "2018-08-06T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn\u0027t otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Incorrect access control",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2019-05-31T20:06:03.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "name": "USN-3730-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/usn/usn-3730-1"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591"
        },
        {
          "name": "GLSA-201808-02",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/201808-02"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=988348"
        },
        {
          "name": "openSUSE-SU-2019:1227",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html"
        },
        {
          "name": "openSUSE-SU-2019:1230",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html"
        },
        {
          "name": "openSUSE-SU-2019:1275",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html"
        },
        {
          "name": "openSUSE-SU-2019:1481",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html"
        }
      ],
      "source": {
        "advisory": "USN-3730-1",
        "defect": [
          "1783591"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2018-08-06T16:00:00.000Z",
          "ID": "CVE-2018-6556",
          "STATE": "PUBLIC",
          "TITLE": "The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "LXC",
                      "version": {
                        "version_data": [
                          {
                            "affected": "\u003e=",
                            "version_affected": "\u003e=",
                            "version_name": "2.0",
                            "version_value": "2.0.9"
                          },
                          {
                            "affected": "\u003e=",
                            "version_affected": "\u003e=",
                            "version_name": "3.0",
                            "version_value": "3.0.0"
                          },
                          {
                            "affected": "\u003c",
                            "version_affected": "\u003c",
                            "version_name": "3.0",
                            "version_value": "3.0.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Matthias Gerstner from SUSE"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn\u0027t otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Incorrect access control"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "USN-3730-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/usn/usn-3730-1"
            },
            {
              "name": "https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591",
              "refsource": "CONFIRM",
              "url": "https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591"
            },
            {
              "name": "GLSA-201808-02",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/201808-02"
            },
            {
              "name": "https://bugzilla.suse.com/show_bug.cgi?id=988348",
              "refsource": "CONFIRM",
              "url": "https://bugzilla.suse.com/show_bug.cgi?id=988348"
            },
            {
              "name": "openSUSE-SU-2019:1227",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html"
            },
            {
              "name": "openSUSE-SU-2019:1230",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html"
            },
            {
              "name": "openSUSE-SU-2019:1275",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html"
            },
            {
              "name": "openSUSE-SU-2019:1481",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html"
            }
          ]
        },
        "source": {
          "advisory": "USN-3730-1",
          "defect": [
            "1783591"
          ],
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2018-6556",
    "datePublished": "2018-08-10T15:00:00.000Z",
    "dateReserved": "2018-02-02T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:38:26.856Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-6556\",\"sourceIdentifier\":\"security@ubuntu.com\",\"published\":\"2018-08-10T15:29:01.297\",\"lastModified\":\"2024-11-21T04:10:53.970\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn\u0027t otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.\"},{\"lang\":\"es\",\"value\":\"Cuando se solicita a lxc-user-nic que elimine una interfaz de red, abrir\u00e1 de forma incondicional una ruta proporcionada por el usuario. Esta ruta de c\u00f3digo podr\u00eda ser empleada por un usuario sin privilegios para comprobar la existencia de una ruta que no hubiese podido alcanzar de otra forma. Tambi\u00e9n podr\u00eda emplearse para desencadenar efectos secundarios provocando la apertura (solo lectura) de archivos especiales del kernel (ptmx, proc, sys). Los productos afectados son LXC: desde la versi\u00f3n 2.0 hasta despu\u00e9s de la la 2.0.9 (incluida) y desde la versi\u00f3n 3.0 hasta despu\u00e9s de la 3.0.0, anterior a la 3.0.2.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":3.3,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":2.1,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"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-417\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:linuxcontainers:lxc:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.0.0\",\"versionEndIncluding\":\"2.0.9\",\"matchCriteriaId\":\"6930BFF7-B9DE-4C00-9417-01142E02D009\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:linuxcontainers:lxc:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.0.0\",\"versionEndExcluding\":\"3.0.2\",\"matchCriteriaId\":\"5618B173-83E7-4BFC-8AE8-22D6CDA7EB3A\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:caas_platform:1.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"44BF9D66-26B1-4BEA-BFA1-9115D06F0C06\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:caas_platform:2.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"85D9542F-8D5A-430B-9804-B8170E067CCE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:suse:openstack_cloud:6:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"53945BEC-81F5-44F8-8035-7A4E5E2DA5B3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:ltss:*:*:*\",\"matchCriteriaId\":\"657C3582-75D1-4724-921C-FD4325D6D1D0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp4:*:*:*:*:*:*\",\"matchCriteriaId\":\"41E76620-EC14-4D2B-828F-53F26DEA5DDC\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F1E78106-58E6-4D59-990F-75DA575BFAD9\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html\",\"source\":\"security@ubuntu.com\"},{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=988348\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://security.gentoo.org/glsa/201808-02\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/usn/usn-3730-1\",\"source\":\"security@ubuntu.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00074.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00076.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00091.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00073.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Third Party Advisory\"]},{\"url\":\"https://bugzilla.suse.com/show_bug.cgi?id=988348\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://security.gentoo.org/glsa/201808-02\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/usn/usn-3730-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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.