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is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID."}, {"lang": "es", "value": "La funci\u00f3n inode_init_owner en fs/inode.c en el kernel de Linux hasta la versi\u00f3n 3.16 permite a los usuarios locales crear archivos con una propiedad de grupo no deseada, en un escenario donde un directorio es SGID a un cierto grupo y es escribible por un usuario que no es miembro de ese grupo. En este caso, el no miembro puede desencadenar la creaci\u00f3n de un archivo simple cuya propiedad de grupo sea ese grupo. El comportamiento previsto era que el no miembro puede activar la creaci\u00f3n de un directorio (pero no un archivo plano) cuya propiedad de grupo sea ese grupo. El no miembro puede aumentar sus privilegios haciendo el archivo plano ejecutable y el SGID"}], "id": "CVE-2018-13405", "lastModified": "2024-11-21T03:47:02.490", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "[email protected]", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "[email protected]", "type": "Primary"}]}, "published": "2018-07-06T14:29:01.223", "references": [{"source": "[email protected]", "tags": ["Patch", "Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0fa3ecd87848c9c93c2c828ef4c3a8ca36ce46c7"}, {"source": "[email protected]", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://openwall.com/lists/oss-security/2018/07/13/2"}, {"source": "[email protected]", "tags": ["Broken Link"], "url": "http://www.securityfocus.com/bid/106503"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:2948"}, {"source": "[email protected]", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:3083"}, {"source": 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{"affected_release": [{"advisory": "RHSA-2019:0717", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-754.12.1.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-04-09T00:00:00Z"}, {"advisory": "RHSA-2019:2476", "cpe": "cpe:/o:redhat:rhel_aus:6.6", "package": "kernel-0:2.6.32-504.80.2.el6", "product_name": "Red Hat Enterprise Linux 6.6 Advanced Update Support", "release_date": "2019-08-13T00:00:00Z"}, {"advisory": "RHSA-2018:3096", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-957.rt56.910.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-10-30T00:00:00Z"}, {"advisory": "RHSA-2018:2948", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-alt-0:4.14.0-115.el7a", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-10-30T00:00:00Z"}, {"advisory": "RHSA-2018:3083", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-957.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-10-30T00:00:00Z"}, {"advisory": "RHSA-2019:4164", "cpe": "cpe:/o:redhat:rhel_aus:7.2", "package": "kernel-0:3.10.0-327.83.1.el7", "product_name": "Red Hat Enterprise Linux 7.2 Advanced Update Support", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:4164", "cpe": "cpe:/o:redhat:rhel_tus:7.2", "package": "kernel-0:3.10.0-327.83.1.el7", "product_name": "Red Hat Enterprise Linux 7.2 Telco Extended Update Support", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:4164", "cpe": "cpe:/o:redhat:rhel_e4s:7.2", "package": "kernel-0:3.10.0-327.83.1.el7", "product_name": "Red Hat Enterprise Linux 7.2 Update Services for SAP Solutions", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:4159", "cpe": "cpe:/o:redhat:rhel_aus:7.3", "package": "kernel-0:3.10.0-514.71.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Advanced Update Support", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:4159", "cpe": "cpe:/o:redhat:rhel_tus:7.3", "package": "kernel-0:3.10.0-514.71.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Telco Extended Update Support", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:4159", "cpe": "cpe:/o:redhat:rhel_e4s:7.3", "package": "kernel-0:3.10.0-514.71.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions", "release_date": "2019-12-10T00:00:00Z"}, {"advisory": "RHSA-2019:2696", "cpe": "cpe:/o:redhat:rhel_eus:7.4", "package": "kernel-0:3.10.0-693.58.1.el7", "product_name": "Red Hat Enterprise Linux 7.4 Extended Update Support", "release_date": "2019-09-12T00:00:00Z"}, {"advisory": "RHSA-2019:2566", "cpe": "cpe:/o:redhat:rhel_eus:7.5", "package": "kernel-0:3.10.0-862.41.1.el7", "product_name": "Red Hat Enterprise Linux 7.5 Extended Update Support", "release_date": "2019-08-27T00:00:00Z"}, {"advisory": "RHSA-2019:2730", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-693.58.1.rt56.652.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2019-09-11T00:00:00Z"}], "bugzilla": {"description": "kernel: Missing check in fs/inode.c:inode_init_owner() does not clear SGID bit on non-directories for non-members", "id": "1599161", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1599161"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-284", "details": ["The inode_init_owner function in fs/inode.c in the Linux kernel through 3.16 allows local users to create files with an unintended group ownership, in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of that group. Here, the non-member can trigger creation of a plain file whose group ownership is that group. The intended behavior was that the non-member can trigger creation of a directory (but not a plain file) whose group ownership is that group. The non-member can escalate privileges by making the plain file executable and SGID.", "A vulnerability was found in the fs/inode.c:inode_init_owner() function logic of the LInux kernel that allows local users to create files with an unintended group ownership and with group execution and SGID permission bits set, in a scenario where a directory is SGID and belongs to a certain group and is writable by a user who is not a member of this group. This can lead to excessive permissions granted in case when they should not."], "name": "CVE-2018-13405", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Will not fix", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2018-07-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-13405\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-13405"], "threat_severity": "Important"}