CVSS: 7.2EPSS: 0%CPEs: 9EXPL: 1CVE-2020-14331 – kernel: kernel: buffer over write in vgacon_scroll
https://notcve.org/view.php?id=CVE-2020-14331
A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Se encontró un fallo en la implementación del kernel de Linux del código de video invertido en consolas VGA cuando un atacante local intenta cambiar el tamaño de la consola, llamando un ioctl VT_RESIZE, lo que causa una escritura fuera de límites. Este fallo permite a un usuario local con acceso a la consola VGA bloquear el sistema, escalando potencialmente sus privilegios en el sistema. • https://bugzilla.redhat.com/show_bug.cgi?id=1858679 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.openwall.net/linux-kernel/2020/07/29/234 https://www.openwall.com/lists/oss-security/2020/07/28/2 https://access.redhat.com/security/cve/CVE-2020-14331 • CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 13EXPL: 0CVE-2020-14314 – kernel: buffer uses out of index in ext3/4 filesystem
https://notcve.org/view.php?id=CVE-2020-14314
A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability. Se encontró un fallo de lectura de memoria fuera de límites en el kernel de Linux versiones anteriores a 5.9-rc2, con el sistema de archivos ext3/ext4, en la manera en que accede a un directorio con indexación rota. Este fallo permite a un usuario local bloquear el sistema si el directorio existe. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14314 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1 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://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7%40redhat.com/T/#u https://usn.ubuntu. • CWE-125: Out-of-bounds Read •
CVSS: 4.1EPSS: 0%CPEs: 4EXPL: 0CVE-2020-25284 – kernel: incomplete permission checking for access to rbd devices
https://notcve.org/view.php?id=CVE-2020-25284
The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe. El controlador de dispositivo del bloque rbd en el archivo drivers/block/rbd.c en el kernel de Linux versiones hasta 5.8.9, usaba una comprobación incompleta de permisos para acceder a dispositivos rbd, que podrían ser aprovechados por atacantes locales para asignar o desasignar dispositivos de bloque rbd, también se conoce como CID-f44d04e696fe A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add or remove Rados Block Devices from the system. • http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f44d04e696feaf13d192d942c4f14ad2e117065a 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://twitter.com/grsecurity/ • CWE-732: Incorrect Permission Assignment for Critical Resource CWE-863: Incorrect Authorization •
CVSS: 6.4EPSS: 0%CPEs: 6EXPL: 0CVE-2020-25285 – kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c
https://notcve.org/view.php?id=CVE-2020-25285
A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux kernel before 5.8.8 could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact, aka CID-17743798d812. Una condición de carrera entre los manejadores hugetlb sysctl en el archivo mm/hugetlb.c en el kernel de Linux versiones anteriores a 5.8.8, podría ser usada por atacantes locales para corromper la memoria, causar una desreferencia del puntero NULL o posiblemente tener otro impacto no especificado, también se conoce como CID-17743798d812 A flaw was found in the Linux kernels sysctl handling code for hugepages management. When multiple root level processes would write to modify the /proc/sys/vm/nr_hugepages file it could create a race on internal variables leading to a system crash or memory corruption. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.8 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17743798d81238ab13050e8e2833699b54e15467 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://security.netapp.com/advisory/ntap-20201009-0002 https://twitter.com/grsecurity/status/1303749848898904067 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-476: NULL Pointer Dereference CWE-787: Out-of-bounds Write •
CVSS: 4.4EPSS: 0%CPEs: 1EXPL: 0CVE-2020-10773 – kernel: kernel stack information leak on s390/s390x
https://notcve.org/view.php?id=CVE-2020-10773
A stack information leak flaw was found in s390/s390x in the Linux kernel’s memory manager functionality, where it incorrectly writes to the /proc/sys/vm/cmm_timeout file. This flaw allows a local user to see the kernel data. Se encontró un fallo de filtrado de información de la pila en s390/s390x en la funcionalidad del administrador de memoria del kernel de Linux, donde escribe incorrectamente en el archivo /proc/sys/vm/cmm_timeout. Este fallo permite a un usuario local visualizar los datos del kernel • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10773 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b8e51a6a9db94bc1fb18ae831b3dab106b5a4b5f https://access.redhat.com/security/cve/CVE-2020-10773 https://bugzilla.redhat.com/show_bug.cgi?id=1846380 • CWE-626: Null Byte Interaction Error (Poison Null Byte) •