CVE-2019-3701

{"id": "CVE-2019-3701", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.9, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "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": 4.4, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 0.8}]}, "published": "2019-01-03T16:29:00.553", "references": [{"url": "http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html", "source": "cve@mitre.org"}, {"url": "http://www.securityfocus.com/bid/106443", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://bugzilla.suse.com/show_bug.cgi?id=1120386", "tags": ["Issue Tracking", "Exploit", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=0aaa81377c5a01f686bcdb8c7a6929a7bf330c68", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://marc.info/?l=linux-netdev&m=154651842302479&w=2", "tags": ["Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://marc.info/?l=linux-netdev&m=154661373531512&w=2", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://support.f5.com/csp/article/K17957133", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://usn.ubuntu.com/3932-1/", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://usn.ubuntu.com/3932-2/", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://usn.ubuntu.com/4115-1/", "source": "cve@mitre.org"}, {"url": "https://usn.ubuntu.com/4118-1/", "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in can_can_gw_rcv in net/can/gw.c in the Linux kernel through 4.19.13. The CAN frame modification rules allow bitwise logical operations that can be also applied to the can_dlc field. The privileged user \"root\" with CAP_NET_ADMIN can create a CAN frame modification rule that makes the data length code a higher value than the available CAN frame data size. In combination with a configured checksum calculation where the result is stored relatively to the end of the data (e.g. cgw_csum_xor_rel) the tail of the skb (e.g. frag_list pointer in skb_shared_info) can be rewritten which finally can cause a system crash. Because of a missing check, the CAN drivers may write arbitrary content beyond the data registers in the CAN controller's I/O memory when processing can-gw manipulated outgoing frames."}, {"lang": "es", "value": "Fue encontrado un problemaa en el parametro can_can_gw_rcv en el archivo net/ can/gw.c en el kernel de Linux hasta la versi\u00f3n 4.19.13. Las reglas de modificaci\u00f3n de la CAN frame permiten operaciones l\u00f3gicas a nivel de bits que tambi\u00e9n se pueden aplicar en el campo can_dlc. El usuario con privilegios \"root\" con CAP_NET_ADMIN puede crear una regla de modificaci\u00f3n de CAN frame que genera que el c\u00f3digo de longitud de datos tenga un valor m\u00e1s alto que el tama\u00f1o de datos que CAN frame tenga disponible. En combinaci\u00f3n con un c\u00e1lculo de suma de comprobaci\u00f3n configurado donde el resultado se almacena en relaci\u00f3n con el final de los datos (por ejemplo, cgw_csum_xor_rel), se puede escribir de nuevo en la cola del skb (por ejemplo, el puntero frag_list en skb_shared_info), lo que finalmente puede ocasionar un fallo del sistema. a causa de la falta de una comprobaci\u00f3n, los controladores CAN pueden escribir contenido arbitrario m\u00e1s all\u00e1 de los registros de datos en la memoria de Entrada/Salida del controlador CAN durante el procesamiento de tramas salientes manipuladas con gw."}], "lastModified": "2019-09-03T00:15:18.033", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FE279FFB-2E93-4DB8-B46B-C16E88F9941D", "versionEndIncluding": "4.19.13"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}