CVE-2017-1000253

{"id": "CVE-2017-1000253", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2017-10-05T01:29:04.790", "references": [{"url": "http://www.securityfocus.com/bid/101010", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "http://www.securitytracker.com/id/1039434", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2793", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2794", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2795", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2796", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2797", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2798", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2799", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2800", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2801", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:2802", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the \"gap\" between the stack and the binary."}, {"lang": "es", "value": "Existe una vulnerabilidad en las distribuciones de Linux que no han parcheado sus kernels de largo mantenimiento con https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (confirmada el 14 de abril de 2015). Esta vulnerabilidad en los kernels se parche\u00f3 en abril de 2015 por el commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (aplicado a Linux 3.10.77 en mayo de 2015), pero no se reconoci\u00f3 como amenaza de seguridad. Con CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE habilitado y una estrategia vertical normal de asignaci\u00f3n de direcciones, load_elf_binary() intentar\u00e1 mapear un binario PIE en un rango de direcciones inmediatamente inferior a mm->mmap_base. Por desgracia, load_elf_ binary() no tiene en cuenta la necesidad de asignar el suficiente espacio para todo el binario, lo que significa que, estando el primer segmento PT_LOAD est\u00e1 mapeado bajo mm->mmap_base, los siguientes segmentos PT_LOAD acaban mapeados sobre mm->mmap_base en el \u00e1rea que deber\u00eda ser el \"hueco\" entre la pila y el binario."}], "lastModified": "2023-01-17T21:04:00.587", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:centos:centos:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED1C5E1D-21F5-46FA-89F6-A9B7E4BC94EE"}, {"criteria": "cpe:2.3:o:centos:centos:6.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "455E5124-9EC1-4C73-997B-212D9DDC5949"}, {"criteria": "cpe:2.3:o:centos:centos:6.2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E3652270-3566-49BF-9235-EE041EF87E63"}, {"criteria": "cpe:2.3:o:centos:centos:6.3:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": 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