Vulnerability-Lookup

GSD-2021-21686

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

Aliases

CVE-2021-21686

Aliases

CVE-2021-21686

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-21686",
    "description": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.",
    "id": "GSD-2021-21686",
    "references": [
      "https://access.redhat.com/errata/RHSA-2021:4833",
      "https://access.redhat.com/errata/RHSA-2021:4829",
      "https://access.redhat.com/errata/RHSA-2021:4827",
      "https://access.redhat.com/errata/RHSA-2021:4801",
      "https://access.redhat.com/errata/RHSA-2021:4799",
      "https://security.archlinux.org/CVE-2021-21686"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-21686"
      ],
      "details": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.",
      "id": "GSD-2021-21686",
      "modified": "2023-12-13T01:23:10.369589Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "jenkinsci-cert@googlegroups.com",
        "ID": "CVE-2021-21686",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Jenkins",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "unspecified",
                          "version_value": "2.318"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Jenkins project"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455",
            "refsource": "MISC",
            "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "(,2.319)",
          "affected_versions": "All versions before 2.319",
          "cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-59",
            "CWE-937"
          ],
          "date": "2021-11-08",
          "description": "File path filters in the agent-to-controller security subsystem of Jenkins do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.",
          "fixed_versions": [],
          "identifier": "CVE-2021-21686",
          "identifiers": [
            "CVE-2021-21686"
          ],
          "not_impacted": "",
          "package_slug": "maven/org.jenkins-ci.main/jenkins-core",
          "pubdate": "2021-11-04",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-21686",
            "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
          ],
          "uuid": "95374f49-761d-41e4-9196-c21158248ef4"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.303.3",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.319",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "jenkinsci-cert@googlegroups.com",
          "ID": "CVE-2021-21686"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-59"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2023-11-22T21:18Z",
      "publishedDate": "2021-11-04T17:15Z"
    }
  }
}

CVE-2021-21686 (GCVE-0-2021-21686)

Vulnerability from cvelistv5 – Published: 2021-11-04 16:30 – Updated: 2024-08-03 18:23

Summary

Severity

No CVSS data available.

Assigner

jenkins mitre root Scorecard

References

1 reference

URL	Tags
https://www.jenkins.io/security/advisory/2021-11-…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Jenkins project	Jenkins	Affected: unspecified , ≤ 2.318 (custom) Affected: unspecified , ≤ LTS 2.303.2 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:23:29.289Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Jenkins",
          "vendor": "Jenkins project",
          "versions": [
            {
              "lessThanOrEqual": "2.318",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "LTS 2.303.2",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-24T15:51:57.191Z",
        "orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
        "shortName": "jenkins"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "jenkinsci-cert@googlegroups.com",
          "ID": "CVE-2021-21686",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Jenkins",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "2.318"
                          },
                          {
                            "version_affected": "\u003c=",
                            "version_value": "LTS 2.303.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Jenkins project"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455",
              "refsource": "CONFIRM",
              "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
    "assignerShortName": "jenkins",
    "cveId": "CVE-2021-21686",
    "datePublished": "2021-11-04T16:30:25.000Z",
    "dateReserved": "2021-01-04T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:23:29.289Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GSD-2021-21686

CVE-2021-21686 (GCVE-0-2021-21686)

Tags

Sightings

Nomenclature

Related by attack behaviour