CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2019-19338 – Kernel: KVM: export MSR_IA32_TSX_CTRL to guest - incomplete fix for TAA (CVE-2019-11135)
https://notcve.org/view.php?id=CVE-2019-19338
A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338 https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort https://www.openwall.com/lists/oss-security/2019/12/10/3 https://access.redhat.com/security/cve/CVE-2019-19338 https://bugzilla.redhat.com/show_bug.cgi?id=1781514 • CWE-203: Observable Discrepancy CWE-385: Covert Timing Channel •
CVSS: 6.1EPSS: 0%CPEs: 3EXPL: 2CVE-2019-19332 – Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid
https://notcve.org/view.php?id=CVE-2019-19332
An out-of-bounds memory write issue was found in the Linux Kernel, version 3.13 through 5.4, in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulting in a denial of service. Se encontró un problema de escritura de memoria fuera de límites en el kernel de Linux, versiones 3.13 hasta 5.4, en la manera en que el hipervisor KVM del kernel de Linux manejó la petición "KVM_GET_EMULATED_CPUID" ioctl(2) para obtener las funcionalidades de CPUID emuladas por el hipervisor KVM. Un usuario o proceso capaz de acceder al dispositivo "/dev/kvm" podría usar este fallo para bloquear el sistema, resultando en una denegación de servicio. An out-of-bounds memory write issue was found in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19332 https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://lore.kernel.org/kvm/000000000000ea5ec20598d90e50%40google.com https://security.netapp.com/advisory/ntap-20200204-0002 https: • CWE-787: Out-of-bounds Write •
CVSS: 4.7EPSS: 0%CPEs: 24EXPL: 1CVE-2019-19965
https://notcve.org/view.php?id=CVE-2019-19965
In the Linux kernel through 5.4.6, there is a NULL pointer dereference in drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related to a PHY down race condition, aka CID-f70267f379b5. En el kernel de Linux versiones hasta 5.4.6, se presenta una desreferencia del puntero NULL en el archivo drivers/scsi/libsas/sas_discover.c debido a un manejo inapropiado de la desconexión del puerto durante la detección, relacionado con una condición de carrera baja PHY, también se conoce como CID-f70267f379b5. • http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f70267f379b5e5e11bdc5d72a56bf17e5feed01f https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://security.netapp.com/advisory/ntap-20200204-0002 https://usn.ubuntu.com/4284-1 https://usn.ubuntu.com/4285-1 https://usn.ubuntu.com/4286-1 https:// • CWE-476: NULL Pointer Dereference •
CVSS: 4.6EPSS: 0%CPEs: 16EXPL: 0CVE-2019-19947
https://notcve.org/view.php?id=CVE-2019-19947
In the Linux kernel through 5.4.6, there are information leaks of uninitialized memory to a USB device in the drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c driver, aka CID-da2311a6385c. En el kernel de Linux versiones hasta 5.4.6, se presenta un filtrado de información de la memoria no inicializada hacia un dispositivo USB en el archivo controlador drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c, también se conoce como CID-da2311a6385c. • http://www.openwall.com/lists/oss-security/2019/12/24/1 https://github.com/torvalds/linux/commit/da2311a6385c3b499da2ed5d9be59ce331fa93e9 https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://security.netapp.com/advisory/ntap-20200204-0002 https://usn.ubuntu.com/4284-1 https://usn.ubuntu.com/4285-1 https://usn.ubuntu.com/4427-1 https://usn.ubuntu.com/4485-1 • CWE-908: Use of Uninitialized Resource •
CVSS: 7.4EPSS: 0%CPEs: 24EXPL: 1CVE-2019-5108 – kernel: triggering AP to send IAPP location updates for stations before the required authentication process has completed can lead to DoS
https://notcve.org/view.php?id=CVE-2019-5108
An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge Authentication and Association Request packets to trigger this vulnerability. Se presenta una vulnerabilidad de denegación de servicio explotable en el kernel de Linux anterior a mainline 5.3. • http://packetstormsecurity.com/files/156455/Kernel-Live-Patch-Security-Notice-LSN-0063-1.html https://git.kernel.org/linus/3e493173b7841259a08c5c8e5cbe90adb349da7e 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-20200204-0002 https://talosintelligence.com/vulnerability_reports/TALOS-2019-0900 https://usn.ubuntu.com • CWE-287: Improper Authentication CWE-440: Expected Behavior Violation •