CVE-2019-18837

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{"affected": [{"affectedData": [{"product": "crun", "vendor": "crun", "versions": [{"status": "affected", "version": "before 0.10.5"}]}], "source": "trellixpsirt@trellix.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:crun_project:crun:*:*:*:*:*:*:*:*", "matchCriteriaId": "7268B1DF-6D31-4372-AF89-03CEBE7907DA", "versionEndExcluding": "0.10.5", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*", "matchCriteriaId": "97A4B8DF-58DA-4AB6-A1F9-331B36409BA3", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*", "matchCriteriaId": "80F0FA5D-8D3B-4C0E-81E2-87998286AF33", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check whether a target is a symlink, resulting in access to files outside of the container. This occurs in libcrun/linux.c and libcrun/chroot_realpath.c."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en crun versiones anteriores a la versi\u00f3n 0.10.5. Con una imagen especialmente dise\u00f1ada, no comprueba correctamente si un objetivo es un enlace simb\u00f3lico, resultando en el acceso a archivos fuera del contenedor. Esto ocurre en los archivos libcrun/linux.c y libcrun/chroot_realpath.c."}], "id": "CVE-2019-18837", "lastModified": "2026-06-17T02:25:26.453", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-11-13T20:15:10.940", "references": [{"source": "trellixpsirt@trellix.com", "url": "https://github.com/containers/crun/pull/173"}, {"source": "trellixpsirt@trellix.com", "url": "https://github.com/containers/crun/releases/tag/0.10.5"}, {"source": "trellixpsirt@trellix.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/"}, {"source": "trellixpsirt@trellix.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/containers/crun/pull/173"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://github.com/containers/crun/releases/tag/0.10.5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DTA5SJUAKQUK6HRY2CZVJUIZP5BO3EOG/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ITB2UNEGHXZUR3ATYHWPSK5LJB36N7AP/"}], "sourceIdentifier": "trellixpsirt@trellix.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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