CVSS: 8.8EPSS: 0%CPEs: 52EXPL: 7CVE-2020-8835 – Linux kernel bpf verifier vulnerability
https://notcve.org/view.php?id=CVE-2020-8835
In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780) En el kernel de Linux versiones 5.5.0 y más recientes, el verificador bpf (kernel/bpf/verifier.c) no restringió apropiadamente los límites de registro para operaciones de 32 bits, conllevando a lecturas y escrituras fuera de límites en la memoria del kernel. La vulnerabilidad también afecta a la serie estable de Linux versión 5.4, comenzando con la versión v5.4.7, ya que el commit de introducción fue respaldado en esa derivación. • https://github.com/zilong3033/CVE-2020-8835 https://github.com/digamma-ai/CVE-2020-8835-verification https://github.com/SplendidSky/CVE-2020-8835 https://github.com/Prabhashaka/Exploitation-CVE-2020-8835 https://github.com/johnatag/INF8602-CVE-2020-8835 https://github.com/snappyJack/Rick_write_exp_CVE-2020-8835 http://www.openwall.com/lists/oss-security/2021/07/20/1 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2d67fec0b43edce8c416101cdc52e71145b5fef& • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •
CVSS: 5.4EPSS: 0%CPEs: 9EXPL: 1CVE-2020-10942 – kernel: vhost-net: stack overflow in get_raw_socket while checking sk_family field
https://notcve.org/view.php?id=CVE-2020-10942
In the Linux kernel before 5.5.8, get_raw_socket in drivers/vhost/net.c lacks validation of an sk_family field, which might allow attackers to trigger kernel stack corruption via crafted system calls. En el kernel de Linux versiones anteriores a 5.5.8, la función get_raw_socket en el archivo drivers/vhost/net.c carece de una comprobación de un campo sk_family, que podría permitir a atacantes desencadenar una corrupción de pila del kernel por medio de llamadas de sistema diseñadas. A stack buffer overflow issue was found in the get_raw_socket() routine of the Host kernel accelerator for virtio net (vhost-net) driver. It could occur while doing an ictol(VHOST_NET_SET_BACKEND) call, and retrieving socket name in a kernel stack variable via get_raw_socket(). A user able to perform ioctl(2) calls on the '/dev/vhost-net' device may use this flaw to crash the kernel resulting in DoS issue. • http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html http://www.openwall.com/lists/oss-security/2020/04/15/4 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.8 https://git.kernel.org/linus/42d84c8490f9f0931786f1623191fcab397c3d64 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://lkml.org/lkm • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-787: Out-of-bounds Write •
CVSS: 5.5EPSS: 0%CPEs: 11EXPL: 2CVE-2020-9391
https://notcve.org/view.php?id=CVE-2020-9391
An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation. Se detectó un problema en el kernel de Linux versión 5.4 y versiones 5.5 hasta 5.5.6 sobre la arquitectura AArch64. Ignora el byte superior en la dirección pasada a la llamada de sistema brk, posiblemente moviendo la memoria hacia abajo cuando la aplicación espera que se mueva hacia arriba, también se conoce como CID-dcde237319e6. • http://www.openwall.com/lists/oss-security/2020/02/25/6 https://bugzilla.redhat.com/show_bug.cgi?id=1797052 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcde237319e626d1ec3c9d8b7613032f0fd4663a https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O4LH35HOPBJIKYHYFXMBBM75DN75PZHZ https://security.netapp.com/advisory/ntap-20200313-0003 • CWE-787: Out-of-bounds Write •
CVSS: 7.1EPSS: 0%CPEs: 18EXPL: 0CVE-2020-9383 – kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c
https://notcve.org/view.php?id=CVE-2020-9383
An issue was discovered in the Linux kernel 3.16 through 5.5.6. set_fdc in drivers/block/floppy.c leads to a wait_til_ready out-of-bounds read because the FDC index is not checked for errors before assigning it, aka CID-2e90ca68b0d2. Se detectó un problema en el kernel de Linux versión 3.16 hasta la versión 5.5.6. La función set_fdc en el archivo drivers/block/floppy.c, conlleva a una lectura fuera de límites de wait_til_ready porque el índice FDC no es comprobado para errores antes de asignarlos, también se conoce como CID-2e90ca68b0d2 An out-of-bounds (OOB) memory access flaw was found in the floppy driver module in the Linux kernel. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=2f9ac30a54dc0181ddac3705cdcf4775d863c530 https://github.com/torvalds/linux/commit/2e90ca68b0d2f5548804f22f0dd61145516171e3 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://security.netapp.com/advisory/ntap& • CWE-125: Out-of-bounds Read •
CVSS: 5.5EPSS: 0%CPEs: 14EXPL: 0CVE-2020-8992
https://notcve.org/view.php?id=CVE-2020-8992
ext4_protect_reserved_inode in fs/ext4/block_validity.c in the Linux kernel through 5.5.3 allows attackers to cause a denial of service (soft lockup) via a crafted journal size. La función ext4_protect_reserved_inode en el archivo fs/ext4/block_validity.c en el kernel de Linux versiones hasta 5.5.3, permite a atacantes causar una denegación de servicio (soft lockup) por medio de un journal size diseñado. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html https://patchwork.ozlabs.org/patch/1236118 https://security.netapp.com/advisory/ntap-20200313-0003 https://usn.ubuntu.com/4318-1 https://usn.ubuntu.com/4324-1 https://usn.ubuntu.com/4342-1 https://usn.ubuntu.com/4344-1 https://usn.ubuntu.com/4419-1 • CWE-400: Uncontrolled Resource Consumption CWE-834: Excessive Iteration •