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: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2020-25220
https://notcve.org/view.php?id=CVE-2020-25220
The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature. El kernel de Linux versiones 4.9.x anteriores a 4.9.233, versiones 4.14.x anteriores a 4.14.194 y versiones 4.19.x anteriores a 4.19.140, presenta un uso de la memoria previamente liberada porque skcd-)no_refcnt no fue considerado durante un backport de un parche del CVE-2020-14356. Esto está relacionado con la funcionalidad cgroups • https://bugzilla.redhat.com/show_bug.cgi?id=1868453 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26e https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html https://lists.debian.org&#x • CWE-416: Use After Free •
CVSS: 7.0EPSS: 0%CPEs: 8EXPL: 0CVE-2020-25212 – kernel: TOCTOU mismatch in the NFS client code
https://notcve.org/view.php?id=CVE-2020-25212
A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. Una discrepancia de TOCTOU en el código del cliente NFS en el kernel de Linux versiones anteriores a 5.8.3, podría ser usada por atacantes locales para dañar la memoria o posiblemente tener otro impacto no especificado porque una comprobación de tamaño se encuentra en el archivo fs/nfs/nfs4proc.c en lugar de fs/nfs/nfs4xdr.c, también se conoce como CID-b4487b935452. A flaw was found in the NFSv4 implementation where when mounting a remote attacker controlled server it could return specially crafted response allow for local memory corruption and possibly privilege escalation. • http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00021.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00035.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00042.html https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.3 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4487b93545214a9db8cbf32e86411677b0cca21 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://lists.debian.org&#x • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition CWE-787: Out-of-bounds Write •