Vulnerability-Lookup

CVE-2021-21615 (GCVE-0-2021-21615)

Vulnerability from cvelistv5 – Published: 2021-01-26 10:55 – Updated: 2024-08-03 18:16

Summary

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Assigner

jenkins mitre root

References

2 references

URL	Tags
https://www.jenkins.io/security/advisory/2021-01-…	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2021/01/26/2	mailing-listx_refsource_MLIST

Impacted products

1 product

Vendor	Product	Version	CPE status
Jenkins project	Jenkins	Affected: 2.275 Affected: LTS 2.263.2	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:16:23.697Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
          },
          {
            "name": "[oss-security] 20210126 Vulnerability in Jenkins",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Jenkins",
          "vendor": "Jenkins project",
          "versions": [
            {
              "status": "affected",
              "version": "2.275"
            },
            {
              "status": "affected",
              "version": "LTS 2.263.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-24T15:50:34.887Z",
        "orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
        "shortName": "jenkins"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
        },
        {
          "name": "[oss-security] 20210126 Vulnerability in Jenkins",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "jenkinsci-cert@googlegroups.com",
          "ID": "CVE-2021-21615",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Jenkins",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "=",
                            "version_value": "2.275"
                          },
                          {
                            "version_affected": "=",
                            "version_value": "LTS 2.263.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Jenkins project"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197",
              "refsource": "CONFIRM",
              "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
            },
            {
              "name": "[oss-security] 20210126 Vulnerability in Jenkins",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
    "assignerShortName": "jenkins",
    "cveId": "CVE-2021-21615",
    "datePublished": "2021-01-26T10:55:13.000Z",
    "dateReserved": "2021-01-04T00:00:00.000Z",
    "dateUpdated": "2024-08-03T18:16:23.697Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-21615",
      "date": "2026-09-21",
      "epss": "0.00899",
      "percentile": "0.57614"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
                  "matchCriteriaId": "4578E2F0-6569-4454-8B83-2474D19D4B3D",
                  "versionEndExcluding": "2.263.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
                  "matchCriteriaId": "41CEBC65-D8D3-433F-A6FE-97102FB5E328",
                  "versionEndExcluding": "2.276",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
        },
        {
          "lang": "es",
          "value": "Jenkins versiones 2.275 y LTS 2.263.2, permiten leer archivos arbitrarios usando el explorador de archivos para espacios de trabajo y artefactos archivados debido a una condici\u00f3n de carrera de tipo time-of-check a time-of-use (TOCTOU)"
        }
      ],
      "id": "CVE-2021-21615",
      "lastModified": "2024-11-21T05:48:42.190",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "LOW",
            "cvssData": {
              "accessComplexity": "MEDIUM",
              "accessVector": "NETWORK",
              "authentication": "SINGLE",
              "availabilityImpact": "NONE",
              "baseScore": 3.5,
              "confidentialityImpact": "PARTIAL",
              "integrityImpact": "NONE",
              "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 6.8,
            "impactScore": 2.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
        ],
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            },
            "exploitabilityScore": 1.6,
            "impactScore": 3.6,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2021-01-26T18:16:18.693",
      "references": [
        {
          "source": "jenkinsci-cert@googlegroups.com",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
        },
        {
          "source": "jenkinsci-cert@googlegroups.com",
          "tags": [
            "Vendor Advisory"
          ],
          "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Vendor Advisory"
          ],
          "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
        }
      ],
      "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-367"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
                    "matchCriteriaId": "4578E2F0-6569-4454-8B83-2474D19D4B3D",
                    "versionEndExcluding": "2.263.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
                    "matchCriteriaId": "41CEBC65-D8D3-433F-A6FE-97102FB5E328",
                    "versionEndExcluding": "2.276",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
          },
          {
            "lang": "es",
            "value": "Jenkins versiones 2.275 y LTS 2.263.2, permiten leer archivos arbitrarios usando el explorador de archivos para espacios de trabajo y artefactos archivados debido a una condici\u00f3n de carrera de tipo time-of-check a time-of-use (TOCTOU)"
          }
        ],
        "id": "CVE-2021-21615",
        "lastModified": "2024-11-21T05:48:42.190",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "NONE",
                "baseScore": 3.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 6.8,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.6,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-01-26T18:16:18.693",
        "references": [
          {
            "source": "jenkinsci-cert@googlegroups.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
          },
          {
            "source": "jenkinsci-cert@googlegroups.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
          }
        ],
        "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-367"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T21:41:18+00:00",
      "cve": "CVE-2021-21615",
      "id": "CVE-2021-21615",
      "initial_release_date": "2021-01-26T00:00:00+00:00",
      "product_status:fixed": "47",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "47",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "jenkins: Filesystem traversal by privileged users",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-21615.json",
      "version": "3"
    }
  }
}

bit-jenkins-2021-21615

Vulnerability from bitnami_vulndb

Published

2024-03-06 11:02

Modified

2026-09-08 08:34

Summary

Details

Jenkins LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "jenkins",
        "purl": "pkg:bitnami/jenkins"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.276.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21615"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
      "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Jenkins LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.",
  "id": "BIT-jenkins-2021-21615",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-03-06T11:02:25.376Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21615"
    }
  ],
  "schema_version": "1.5.0"
}

CNVD-2021-13672

Vulnerability from cnvd - Published: 2021-03-01

Title

CloudBees Jenkins TOCTOU竞争条件漏洞

Description

Jenkins是一个用Java编写的开源持续集成工具，主要用于持续、自动的构建/测试软件项目、监控外部任务的运行。 Jenkins 2.275、LTS 2.263.2存在TOCTOU竞争条件漏洞。攻击者可通过工作区和已归档工件浏览器利用该漏洞读取任意文件。

Severity

低

Patch Name

CloudBees Jenkins TOCTOU竞争条件漏洞的补丁

Patch Description

Jenkins是一个用Java编写的开源持续集成工具，主要用于持续、自动的构建/测试软件项目、监控外部任务的运行。 Jenkins 2.275、LTS 2.263.2存在TOCTOU竞争条件漏洞。攻击者可通过工作区和已归档工件浏览器利用该漏洞读取任意文件。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新：https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197

Reference

http://www.openwall.com/lists/oss-security/2021/01/26/2

Impacted products

Name
['CloudBees Jenkins 2.275', 'CloudBees Jenkins LTS 2.263.2']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-21615",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-21615"
    }
  },
  "description": "Jenkins\u662f\u4e00\u4e2a\u7528Java\u7f16\u5199\u7684\u5f00\u6e90\u6301\u7eed\u96c6\u6210\u5de5\u5177\uff0c\u4e3b\u8981\u7528\u4e8e\u6301\u7eed\u3001\u81ea\u52a8\u7684\u6784\u5efa/\u6d4b\u8bd5\u8f6f\u4ef6\u9879\u76ee\u3001\u76d1\u63a7\u5916\u90e8\u4efb\u52a1\u7684\u8fd0\u884c\u3002\n\nJenkins 2.275\u3001LTS 2.263.2\u5b58\u5728TOCTOU\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5de5\u4f5c\u533a\u548c\u5df2\u5f52\u6863\u5de5\u4ef6\u6d4f\u89c8\u5668\u5229\u7528\u8be5\u6f0f\u6d1e\u8bfb\u53d6\u4efb\u610f\u6587\u4ef6\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1ahttps://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-13672",
  "openTime": "2021-03-01",
  "patchDescription": "Jenkins\u662f\u4e00\u4e2a\u7528Java\u7f16\u5199\u7684\u5f00\u6e90\u6301\u7eed\u96c6\u6210\u5de5\u5177\uff0c\u4e3b\u8981\u7528\u4e8e\u6301\u7eed\u3001\u81ea\u52a8\u7684\u6784\u5efa/\u6d4b\u8bd5\u8f6f\u4ef6\u9879\u76ee\u3001\u76d1\u63a7\u5916\u90e8\u4efb\u52a1\u7684\u8fd0\u884c\u3002\r\n\r\nJenkins 2.275\u3001LTS 2.263.2\u5b58\u5728TOCTOU\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5de5\u4f5c\u533a\u548c\u5df2\u5f52\u6863\u5de5\u4ef6\u6d4f\u89c8\u5668\u5229\u7528\u8be5\u6f0f\u6d1e\u8bfb\u53d6\u4efb\u610f\u6587\u4ef6\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "CloudBees Jenkins TOCTOU\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "CloudBees Jenkins 2.275",
      "CloudBees Jenkins LTS 2.263.2"
    ]
  },
  "referenceLink": "http://www.openwall.com/lists/oss-security/2021/01/26/2",
  "serverity": "\u4f4e",
  "submitTime": "2021-01-27",
  "title": "CloudBees Jenkins TOCTOU\u7ade\u4e89\u6761\u4ef6\u6f0f\u6d1e"
}

FKIE_CVE-2021-21615

Vulnerability from fkie_nvd - Published: 2021-01-26 18:16 - Updated: 2026-06-17 03:35

Severity

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

Summary

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

References

URL	Tags
jenkinsci-cert@googlegroups.com	http://www.openwall.com/lists/oss-security/2021/01/26/2	Mailing List, Third Party Advisory
jenkinsci-cert@googlegroups.com	https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2021/01/26/2	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197	Vendor Advisory

Impacted products

	Vendor	Product	Version
	jenkins	jenkins	*
	jenkins	jenkins	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Jenkins",
          "vendor": "Jenkins project",
          "versions": [
            {
              "status": "affected",
              "version": "2.275"
            },
            {
              "status": "affected",
              "version": "LTS 2.263.2"
            }
          ]
        }
      ],
      "source": "jenkinsci-cert@googlegroups.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
              "matchCriteriaId": "4578E2F0-6569-4454-8B83-2474D19D4B3D",
              "versionEndExcluding": "2.263.3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
              "matchCriteriaId": "41CEBC65-D8D3-433F-A6FE-97102FB5E328",
              "versionEndExcluding": "2.276",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
    },
    {
      "lang": "es",
      "value": "Jenkins versiones 2.275 y LTS 2.263.2, permiten leer archivos arbitrarios usando el explorador de archivos para espacios de trabajo y artefactos archivados debido a una condici\u00f3n de carrera de tipo time-of-check a time-of-use (TOCTOU)"
    }
  ],
  "id": "CVE-2021-21615",
  "lastModified": "2026-06-17T03:35:52.627",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 6.8,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-01-26T18:16:18.693",
  "references": [
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
    },
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
    }
  ],
  "sourceIdentifier": "jenkinsci-cert@googlegroups.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-QXP6-27GW-99CJ

Vulnerability from github – Published: 2022-05-24 17:40 – Updated: 2022-12-13 15:58

Summary

Time-of-check Time-of-use (TOCTOU) Race Condition in Jenkins

Details

Due to a time-of-check to time-of-use (TOCTOU) race condition, the file browser for workspaces, archived artifacts, and $JENKINS_HOME/userContent/ follows symbolic links to locations outside the directory being browsed in Jenkins 2.275 and LTS 2.263.2.

This allows attackers with Job/Workspace permission and the ability to control workspace contents, e.g., with Job/Configure permission or the ability to change SCM contents, to create symbolic links that allow them to access files outside workspaces using the workspace browser.

This issue is caused by an incorrectly applied fix for SECURITY-1452 / CVE-2021-21602 in the 2021-01-13 security advisory.

Jenkins 2.276, LTS 2.263.3 no longer differentiates the check and the use of symlinks in workspace browsers.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.263.2"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.263.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.275"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.jenkins-ci.main:jenkins-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.264"
            },
            {
              "fixed": "2.276"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-21615"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-367"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-06-23T06:50:38Z",
    "nvd_published_at": "2021-01-26T18:16:00Z",
    "severity": "MODERATE"
  },
  "details": "Due to a time-of-check to time-of-use (TOCTOU) race condition, the file browser for workspaces, archived artifacts, and `$JENKINS_HOME/userContent/` follows symbolic links to locations outside the directory being browsed in Jenkins 2.275 and LTS 2.263.2.\n\nThis allows attackers with Job/Workspace permission and the ability to control workspace contents, e.g., with Job/Configure permission or the ability to change SCM contents, to create symbolic links that allow them to access files outside workspaces using the workspace browser.\n\nThis issue is caused by an incorrectly applied fix for SECURITY-1452 / CVE-2021-21602 in the [2021-01-13 security advisory](https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-1452).\n\nJenkins 2.276, LTS 2.263.3 no longer differentiates the check and the use of symlinks in workspace browsers.",
  "id": "GHSA-qxp6-27gw-99cj",
  "modified": "2022-12-13T15:58:50Z",
  "published": "2022-05-24T17:40:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21615"
    },
    {
      "type": "WEB",
      "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Time-of-check Time-of-use (TOCTOU) Race Condition in Jenkins"
}

GSD-2021-21615

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

Details

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

Aliases

CVE-2021-21615

Aliases

CVE-2021-21615

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-21615",
    "description": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.",
    "id": "GSD-2021-21615",
    "references": [
      "https://access.redhat.com/errata/RHSA-2021:0429",
      "https://access.redhat.com/errata/RHSA-2021:0423",
      "https://security.archlinux.org/CVE-2021-21615"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-21615"
      ],
      "details": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.",
      "id": "GSD-2021-21615",
      "modified": "2023-12-13T01:23:11.022915Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "jenkinsci-cert@googlegroups.com",
        "ID": "CVE-2021-21615",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Jenkins",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "2.275"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "LTS 2.263.2"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Jenkins project"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197",
            "refsource": "MISC",
            "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
          },
          {
            "name": "http://www.openwall.com/lists/oss-security/2021/01/26/2",
            "refsource": "MISC",
            "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "[,2.276)",
          "affected_versions": "All versions before 2.276",
          "cvss_v2": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-367",
            "CWE-937"
          ],
          "date": "2021-02-02",
          "description": "Jenkins allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.",
          "fixed_versions": [
            "2.276"
          ],
          "identifier": "CVE-2021-21615",
          "identifiers": [
            "CVE-2021-21615"
          ],
          "not_impacted": "All versions starting from 2.276",
          "package_slug": "maven/org.jenkins-ci.main/jenkins-core",
          "pubdate": "2021-01-26",
          "solution": "Upgrade to version 2.276 or higher",
          "title": "Time-of-check Time-of-use (TOCTOU) Race Condition",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-21615",
            "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
          ],
          "uuid": "f1360d1c-2656-4843-b694-5ea5fcf68b2e"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.276",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "2.263.3",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "jenkinsci-cert@googlegroups.com",
          "ID": "CVE-2021-21615"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-367"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://www.jenkins.io/security/advisory/2021-01-26/#SECURITY-2197"
            },
            {
              "name": "[oss-security] 20210126 Vulnerability in Jenkins",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/01/26/2"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 3.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 6.8,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 1.6,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-10-25T18:16Z",
      "publishedDate": "2021-01-26T18:16Z"
    }
  }
}

RHSA-2021:0423

Vulnerability from csaf_redhat - Published: 2021-02-17 19:06 - Updated: 2026-08-11 15:09

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.6.17 security and packages update

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2021-21615.

CVE-2021-21615

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Fixed: 2 products Known not affected: 46 products

https://access.redhat.com/errata/RHSA-2021:0423

Open the full advisory

RHSA-2021:0429

Vulnerability from csaf_redhat - Published: 2021-03-03 04:19 - Updated: 2026-08-11 15:09

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.5.33 packages and security update

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2021-21615.

CVE-2021-21615

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Fixed: 45 products

https://access.redhat.com/errata/RHSA-2021:0429

Open the full advisory

RHSA-2021_0423

Vulnerability from csaf_redhat - Published: 2021-02-17 19:06 - Updated: 2024-11-22 16:25

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.6.17 security and packages update

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2021-21615.

CVE-2021-21615

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Fixed: 2 products Known not affected: 46 products

https://access.redhat.com/errata/RHSA-2021:0423

Open the full advisory

RHSA-2021_0429

Vulnerability from csaf_redhat - Published: 2021-03-03 04:19 - Updated: 2024-11-22 16:25

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.5.33 packages and security update

Severity

Important

Scope

13 vulnerabilities in this advisory, including CVE-2021-21615.

CVE-2021-21615

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Fixed: 45 products

https://access.redhat.com/errata/RHSA-2021:0429

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

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

CVE-2021-21615 (GCVE-0-2021-21615)

Vulnerability from bitnami_vulndb

Tags

Sightings

Nomenclature

Related by attack behaviour