CVSS: 7.8EPSS: 0%CPEs: 18EXPL: 1CVE-2020-10757 – kernel: kernel: DAX hugepages not considered during mremap
https://notcve.org/view.php?id=CVE-2020-10757
A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system. Se encontró un fallo en el kernel de Linux en las versiones posteriores a 4.5-rc1, en la manera en que mremap manejó DAX Huge Pages. Este fallo permite a un atacante local con acceso a un almacenamiento habilitado para DAX escalar sus privilegios en el sistema A flaw was found in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system. • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html https://bugzilla.redhat.com/show_bug.cgi?id=1842525 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5bfea2d9b17f1034a68147a8b03b9789af5700f9 https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IEM47BXZJLODRH5YNNZSAQ2NVM63MYMC https://security.netapp.com/advisory/ntap-20200702-0004 https://usn.ubuntu.com& • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') •
CVSS: 5.3EPSS: 0%CPEs: 44EXPL: 0CVE-2020-12888 – Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
https://notcve.org/view.php?id=CVE-2020-12888
The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space. El controlador VFIO PCI en el kernel de Linux versiones hasta 5.6.13, maneja inapropiadamente los intentos para acceder al espacio de memoria deshabilitado. A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable access to the devices' MMIO memory address spaces. If a user attempts to access the read/write devices' MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal error condition, crashing the system. • http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html http://www.openwall.com/lists/oss-security/2020/05/19/6 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org • CWE-248: Uncaught Exception CWE-755: Improper Handling of Exceptional Conditions •
CVSS: 6.7EPSS: 0%CPEs: 44EXPL: 0CVE-2020-12770 – kernel: sg_write function lacks an sg_remove_request call in a certain failure case
https://notcve.org/view.php?id=CVE-2020-12770
An issue was discovered in the Linux kernel through 5.6.11. sg_write lacks an sg_remove_request call in a certain failure case, aka CID-83c6f2390040. Se detectó un problema en el kernel de Linux versiones hasta 5.6.11. La función sg_write, carece de una llamada a sg_remove_request en un determinado caso de fallo, también se conoce como CID-83c6f2390040. A vulnerability was found in sg_write in drivers/scsi/sg.c in the SCSI generic (sg) driver subsystem. This flaw allows an attacker with local access and special user or root privileges to cause a denial of service if the allocated list is not cleaned with an invalid (Sg_fd * sfp) pointer at the time of failure, also possibly causing a kernel internal information leak problem. • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83c6f2390040f188cc25b270b4befeb5628c1aee https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ES5C6ZCMALBEBMKNNCTBSLLSYGFZG3FF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedora • CWE-416: Use After Free •
CVSS: 5.3EPSS: 0%CPEs: 6EXPL: 1CVE-2020-10933 – ruby: BasicSocket#read_nonblock method leads to information disclosure
https://notcve.org/view.php?id=CVE-2020-10933
An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter. Se descubrió un problema en Ruby versiones 2.5.x hasta 2.5.7, versiones 2.6.x hasta 2.6.5, y versión 2.7.0. • https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5 https://security.netapp.com/advisory/ntap-20200625-0001 https://www.debian.org/security/2020/dsa-4721 https://www.ruby-lang.org/en/news/2020/03/31/heap-exposure-in-socket-cve-2020-10933 https://access.redhat.com/security/cve/CVE-2020-10933 https://bugzilla.redhat.com/show_bug.cgi?id=1833291 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE-908: Use of Uninitialized Resource •
CVSS: 7.0EPSS: 0%CPEs: 44EXPL: 0CVE-2020-11884 – Kernel: s390: page table upgrade in secondary address mode may lead to privilege escalation
https://notcve.org/view.php?id=CVE-2020-11884
In the Linux kernel 4.19 through 5.6.7 on the s390 platform, code execution may occur because of a race condition, as demonstrated by code in enable_sacf_uaccess in arch/s390/lib/uaccess.c that fails to protect against a concurrent page table upgrade, aka CID-3f777e19d171. A crash could also occur. En el kernel de Linux versión 4.9 hasta la versión 5.6.7, en la plataforma s390, una ejecución de código puede presentarse debido a una condición de carrera, como es demostrado por el código en la función enable_sacf_uaccess en el archivo arch/s390/lib/uaccess.c que presenta un fallo al proteger contra una actualización concurrente de la tabla de página, también se conoce como CID-3f777e19d171. Tambíen podría ocurrir un bloqueo A flaw was found in the Linux kernel on s390 architecture. The issue occurs on multiprocessing systems when one s390 CPU is in Secondary Address Mode and another CPU does a kernel page table upgrade. • https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=215d1f3928713d6eaec67244bcda72105b898000 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3f777e19d171670ab558a6d5e6b1ac7f9b6c574f https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TZBP2HINNAX7HKHCOUMIFVQPV6GWMCZ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AQUVKC3IPUC5B374VVAZV4J5P3GAUGSW https://lists.fedoraproject.org/archives/list/package-announce%4 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-1251: Mirrored Regions with Different Values •