github - ghsa-h5g7-x752-wjh8

ghsa-h5g7-x752-wjh8

Vulnerability from github

Published

2022-05-24 17:16

Modified

2022-05-24 17:16

Details

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2019-15793"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-24T00:15:00Z",
    "severity": "MODERATE"
  },
  "details": "In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.",
  "id": "GHSA-h5g7-x752-wjh8",
  "modified": "2022-05-24T17:16:24Z",
  "published": "2022-05-24T17:16:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15793"
    },
    {
      "type": "WEB",
      "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/usn/usn-4183-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/usn/usn-4184-1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2019-15793

Vulnerability from cvelistv5

Published

2020-04-23 23:55

Modified

2024-09-16 16:58

Severity ?

6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Summary

References

▼	URL	Tags
	https://usn.ubuntu.com/usn/usn-4183-1	x_refsource_MISC
	https://usn.ubuntu.com/usn/usn-4184-1	x_refsource_MISC
	https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

Ubuntu

Shiftfs in the Linux kernel

Version: 5.3.0-11.12 < 5.3 kernel*
Version: 5.0 kernel < 5.0.0-35.38

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T00:56:22.425Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/usn/usn-4183-1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/usn/usn-4184-1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Shiftfs in the Linux kernel",
          "vendor": "Ubuntu",
          "versions": [
            {
              "changes": [
                {
                  "at": "5.3.0-22.24",
                  "status": "unaffected"
                }
              ],
              "lessThan": "5.3 kernel*",
              "status": "affected",
              "version": "5.3.0-11.12",
              "versionType": "custom"
            },
            {
              "lessThan": "5.0.0-35.38",
              "status": "affected",
              "version": "5.0 kernel",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jann Horn of Google Project Zero"
        }
      ],
      "datePublic": "2019-11-12T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-538",
              "description": "CWE-538 File and Directory Information Exposure",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-04-23T23:55:24",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://usn.ubuntu.com/usn/usn-4183-1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://usn.ubuntu.com/usn/usn-4184-1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb"
        }
      ],
      "source": {
        "defect": [
          "https://bugs.launchpad.net/bugs/1850867"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Mishandling of file-system uid/gid with namespaces in shiftfs",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2019-11-12 18:00:00 UTC",
          "ID": "CVE-2019-15793",
          "STATE": "PUBLIC",
          "TITLE": "Mishandling of file-system uid/gid with namespaces in shiftfs"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Shiftfs in the Linux kernel",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003e=",
                            "version_name": "5.3 kernel",
                            "version_value": "5.3.0-11.12"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "5.3 kernel",
                            "version_value": "5.3.0-22.24"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "5.0 kernel",
                            "version_value": "5.0.0-35.38"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Ubuntu"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Jann Horn of Google Project Zero"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-538 File and Directory Information Exposure"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://usn.ubuntu.com/usn/usn-4183-1",
              "refsource": "MISC",
              "url": "https://usn.ubuntu.com/usn/usn-4183-1"
            },
            {
              "name": "https://usn.ubuntu.com/usn/usn-4184-1",
              "refsource": "MISC",
              "url": "https://usn.ubuntu.com/usn/usn-4184-1"
            },
            {
              "name": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb",
              "refsource": "MISC",
              "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb"
            }
          ]
        },
        "source": {
          "defect": [
            "https://bugs.launchpad.net/bugs/1850867"
          ],
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2019-15793",
    "datePublished": "2020-04-23T23:55:24.581625Z",
    "dateReserved": "2019-08-29T00:00:00",
    "dateUpdated": "2024-09-16T16:58:57.384Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted