CVE-2021-21687

{"containers": {"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": "Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar."}], "providerMetadata": {"orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "shortName": "jenkins", "dateUpdated": "2023-10-24T15:51:58.389Z"}, "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-2021-21687", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Jenkins", "version": {"version_data": [{"version_affected": "<=", "version_value": "2.318"}, {"version_affected": "<=", "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": "Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-862: Missing Authorization"}]}]}, "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"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:23:28.304Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"}]}]}, "cveMetadata": {"assignerOrgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b", "assignerShortName": "jenkins", "cveId": "CVE-2021-21687", "datePublished": "2021-11-04T16:30:27.000Z", "dateReserved": "2021-01-04T00:00:00.000Z", "dateUpdated": "2024-08-03T18:23:28.304Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "jenkinsci-cert@googlegroups.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*", "matchCriteriaId": "0B0C915B-C3A9-4BB9-B122-749CF43BB7DE", "versionEndExcluding": "2.303.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*", "matchCriteriaId": "3D231DBA-462F-4BC5-8F04-23109A7EF1F8", "versionEndExcluding": "2.319", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar."}, {"lang": "es", "value": "Jenkins versiones 2.318 y anteriores, LTS versiones 2.303.2 y anteriores, no comprueban el acceso agente-controlador para crear enlaces simb\u00f3licos cuando se desarchiva un enlace simb\u00f3lico en FilePath#untar"}], "id": "CVE-2021-21687", "lastModified": "2026-06-17T03:35:59.900", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 6.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-04T17:15:08.390", "references": [{"source": "jenkinsci-cert@googlegroups.com", "tags": ["Vendor Advisory"], "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:4827", "cpe": "cpe:/a:redhat:openshift:3.11::el7", "package": "jenkins-0:2.303.3.1637698110-1.el7", "product_name": "Red Hat OpenShift Container Platform 3.11", "release_date": "2021-12-02T00:00:00Z"}, {"advisory": "RHSA-2021:4799", "cpe": "cpe:/a:redhat:openshift:4.6::el8", "package": "jenkins-0:2.303.3.1637597493-1.el8", "product_name": "Red Hat OpenShift Container Platform 4.6", "release_date": "2021-12-02T00:00:00Z"}, {"advisory": "RHSA-2021:4801", "cpe": "cpe:/a:redhat:openshift:4.7::el8", "package": "jenkins-0:2.303.3.1637597018-1.el8", "product_name": "Red Hat OpenShift Container Platform 4.7", "release_date": "2021-12-01T00:00:00Z"}, {"advisory": "RHSA-2021:4829", "cpe": "cpe:/a:redhat:openshift:4.8::el8", "package": "jenkins-0:2.303.3.1637596565-1.el8", "product_name": "Red Hat OpenShift Container Platform 4.8", "release_date": "2021-11-30T00:00:00Z"}, {"advisory": "RHSA-2021:4833", "cpe": "cpe:/a:redhat:openshift:4.9::el8", "package": "jenkins-0:2.303.3.1637595827-1.el8", "product_name": "Red Hat OpenShift Container Platform 4.9", "release_date": "2021-11-29T00:00:00Z"}], "bugzilla": {"description": "jenkins: FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link", "id": "2020324", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2020324"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.0", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-59", "details": ["Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.", "An incorrect permissions validation vulnerability was found in Jenkins. The FilePath#untar does not check permission to create symbolic links when unarchiving a symbolic link, which may allow an attacker to get read and write access to arbitrary files on the Jenkins controller file system."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-21687", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "jenkins", "product_name": "Red Hat Fuse 7"}], "public_date": "2021-11-04T14:20:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-21687\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-21687\nhttps://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455"], "threat_severity": "Important"}

{}