CVE-2017-1000255

{"id": "CVE-2017-1000255", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 9.2, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2017-10-30T20:29:00.230", "references": [{"url": "http://www.securityfocus.com/bid/101264", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2018:0654", "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/security/cve/CVE-2017-1000255", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.securityfocus.com/bid/101264", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/errata/RHSA-2018:0654", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://access.redhat.com/security/cve/CVE-2017-1000255", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "On Linux running on PowerPC hardware (Power8 or later) a user process can craft a signal frame and then do a sigreturn so that the kernel will take an exception (interrupt), and use the r1 value *from the signal frame* as the kernel stack pointer. As part of the exception entry the content of the signal frame is written to the kernel stack, allowing an attacker to overwrite arbitrary locations with arbitrary values. The exception handling does produce an oops, and a panic if panic_on_oops=1, but only after kernel memory has been over written. This flaw was introduced in commit: \"5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)\" which was merged upstream into v4.9-rc1. Please note that kernels built with CONFIG_PPC_TRANSACTIONAL_MEM=n are not vulnerable."}, {"lang": "es", "value": "Cuando Linux se ejecuta en hardware PowerPC (Power8 o posterior), un proceso de usuario puede manipular un frame de se\u00f1al y, a continuaci\u00f3n, realizar un sigreturn para que el kernel tome un excepci\u00f3n (interrupt) y emplee el valor r1 (desde el frame de se\u00f1al) como el puntero de la pila del kernel. Como parte de la entrada de excepci\u00f3n, el contenido del frame de se\u00f1al est\u00e1 escrito en la pila del kernel, permitiendo que un atacante sobrescriba localizaciones arbitrarias con valores arbitrarios. La manipulaci\u00f3n de excepciones produce un error OOPS y p\u00e1nico si panic_on_oops=1, pero solo una vez se haya sobrescrito la memoria de la pila. Este fallo fue introducido en el commit con ID: \"5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)\" que se ha combinado de forma ascendente en v4.9-rc1. Se debe tener en cuenta que los kernels compilados con CONFIG_PPC_TRANSACTIONAL_MEM=n no son vulnerables."}], "lastModified": "2024-11-21T03:04:30.800", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:ibm:powerpc_power8:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "939AB0E7-045F-4AD8-900A-816A91B43AF0"}, {"criteria": "cpe:2.3:h:ibm:powerpc_power9:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "C60B30EF-F7A2-49FA-AF1C-17D47C0DB2BA"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}