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This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur with FUSE requests."}, {"lang": "es", "value": "El kernel de Linux, en versiones anteriores a 5.1-rc5, permite el desbordamiento de la cuenta de referencia de p\u00e1gina->_refcount, con los consiguientes problemas de uso de memoria despu\u00e9s de su liberaci\u00f3n, si existen alrededor de 140 GiB de RAM. Esto est\u00e1 relacionado con fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, y mm/hugetlb.c. Puede ocurrir con las peticiones de FUSE."}], "id": "CVE-2019-11487", "lastModified": "2024-11-21T04:21:11.007", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-04-23T22:29:05.367", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2019/04/29/1"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/108054"}, {"source": 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Advisory"], "url": "https://support.f5.com/csp/article/K14255532"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4069-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4069-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4115-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4118-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4145-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2020:4182", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-754.35.1.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-10-07T00:00:00Z"}, {"advisory": "RHSA-2020:0839", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1062.18.1.rt56.1044.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-03-17T00:00:00Z"}, {"advisory": "RHSA-2020:0174", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-alt-0:4.14.0-115.17.1.el7a", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-01-21T00:00:00Z"}, {"advisory": "RHSA-2020:0834", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1062.18.1.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-03-17T00:00:00Z"}, {"advisory": "RHSA-2020:3230", "cpe": "cpe:/o:redhat:rhel_aus:7.4", "package": "kernel-0:3.10.0-693.71.2.el7", "product_name": "Red Hat Enterprise Linux 7.4 Advanced Update Support", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3230", "cpe": "cpe:/o:redhat:rhel_tus:7.4", "package": "kernel-0:3.10.0-693.71.2.el7", "product_name": "Red Hat Enterprise Linux 7.4 Telco Extended Update Support", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:3230", "cpe": "cpe:/o:redhat:rhel_e4s:7.4", "package": "kernel-0:3.10.0-693.71.2.el7", "product_name": "Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions", "release_date": "2020-07-29T00:00:00Z"}, {"advisory": "RHSA-2020:2851", "cpe": "cpe:/o:redhat:rhel_eus:7.6", "package": "kernel-0:3.10.0-957.56.1.el7", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2020-07-07T00:00:00Z"}, {"advisory": "RHSA-2019:2741", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-80.11.1.rt9.156.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-09-12T00:00:00Z"}, {"advisory": "RHSA-2019:2703", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-80.11.1.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-09-12T00:00:00Z"}, {"advisory": "RHSA-2020:3266", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-693.71.2.rt56.670.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2020-08-03T00:00:00Z"}, {"advisory": "RHSA-2020:2851", "cpe": "cpe:/o:redhat:enterprise_linux:7::hypervisor", "package": "kernel-0:3.10.0-957.56.1.el7", "product_name": "Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2020-07-07T00:00:00Z"}], "bugzilla": {"description": "kernel: Count overflow in FUSE request leading to use-after-free issues.", "id": "1703063", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1703063"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur with FUSE requests.", "A flaw was found in the Linux kernel's implementation of the FUSE filesystem, where it allows a page reference counter overflow. If a page reference counter overflows into a negative value, it can be placed back into the \"free\" list for reuse by other applications. This flaw allows a local attacker who can manipulate memory page reference counters to cause memory corruption and possible privilege escalation by triggering a use-after-free condition.\nThe current attack requires the system to have approximately 140 GB of RAM for this attack to be performed. It may be possible that the attack can occur with fewer memory requirements."], "mitigation": {"lang": "en:us", "value": "Preventing loading of the 'fuse' kernel module will prevent attackers from using this exploit against the system; howeve the functionality of being able to access the filesystems that would be allowed by fuse would no longer be allowed . See \u201cHow do I blacklist a kernel module to prevent it from loading automatically?\" ( https://access.redhat.com/solutions/41278) for instructions on how to disable the 'fuse' kernel module from autoloading. This mitigation may not be suitable if access to the functionality provided by fuse is required."}, "name": "CVE-2019-11487", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2019-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-11487\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-11487"], "threat_severity": "Important"}

{}