CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-1000252 – kernel: kvm: Reachable BUG() on out-of-bounds guest IRQ
https://notcve.org/view.php?id=CVE-2017-1000252
The KVM subsystem in the Linux kernel through 4.13.3 allows guest OS users to cause a denial of service (assertion failure, and hypervisor hang or crash) via an out-of bounds guest_irq value, related to arch/x86/kvm/vmx.c and virt/kvm/eventfd.c. El subsistema KVM en el kernel de Linux hasta la versión 4.13.3 permite que los usuarios invitados del sistema operativo provoquen una denegación de servicio (fallo de aserción y bloqueo o cierre inesperado del hipervisor) mediante un valor guest_irq fuera de límites, relacionado con arch/x86/kvm/vmx.c y virt/kvm/eventfd.c. A reachable assertion failure flaw was found in the Linux kernel built with KVM virtualisation(CONFIG_KVM) support with Virtual Function I/O feature (CONFIG_VFIO) enabled. This failure could occur if a malicious guest device sent a virtual interrupt (guest IRQ) with a larger (>1024) index value. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=36ae3c0a36b7456432fedce38ae2f7bd3e01a563 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3a8b0677fc6180a467e26cc32ce6b0c09a32f9bb http://www.debian.org/security/2017/dsa-3981 http://www.openwall.com/lists/oss-security/2017/09/15/4 http://www.securityfocus.com/bid/101022 https://access.redhat.com/errata/RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:1062 https://access.redhat.com& • CWE-20: Improper Input Validation CWE-617: Reachable Assertion •
CVSS: 7.1EPSS: 0%CPEs: 1EXPL: 0CVE-2017-12154 – Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register
https://notcve.org/view.php?id=CVE-2017-12154
The prepare_vmcs02 function in arch/x86/kvm/vmx.c in the Linux kernel through 4.13.3 does not ensure that the "CR8-load exiting" and "CR8-store exiting" L0 vmcs02 controls exist in cases where L1 omits the "use TPR shadow" vmcs12 control, which allows KVM L2 guest OS users to obtain read and write access to the hardware CR8 register. La función prepare_vmcs02 en arch/x86/kvm/vmx.c en el kernel de Linux hasta la versión 4.13.3 no asegura que los controles L0 vmcs02 "CR8-load exiting" y "CR8-store exiting" existan en casos en los que L1 omite el control vmcs12 "use TPR shadow". Esto permite que los usuarios invitados del sistema operativo obtengan acceso de lectura y escritura al registro CR8 del hardware. Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization (nVMX) feature enabled (nested=1), is vulnerable to a crash due to disabled external interrupts. As L2 guest could access (r/w) hardware CR8 register of the host(L0). • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=51aa68e7d57e3217192d88ce90fd5b8ef29ec94f http://www.debian.org/security/2017/dsa-3981 http://www.securityfocus.com/bid/100856 https://access.redhat.com/errata/RHSA-2018:0676 https://access.redhat.com/errata/RHSA-2018:1062 https://access.redhat.com/errata/RHSA-2019:1946 https://bugzilla.redhat.com/show_bug.cgi?id=1491224 https://github.com/torvalds/linux/commit/51aa68e7d57e3217192d88ce90fd5b8ef29ec94f https://usn.ubuntu.c • CWE-284: Improper Access Control •
CVSS: 4.9EPSS: 0%CPEs: 5EXPL: 0CVE-2017-12153
https://notcve.org/view.php?id=CVE-2017-12153
A security flaw was discovered in the nl80211_set_rekey_data() function in net/wireless/nl80211.c in the Linux kernel through 4.13.3. This function does not check whether the required attributes are present in a Netlink request. This request can be issued by a user with the CAP_NET_ADMIN capability and may result in a NULL pointer dereference and system crash. Se descubrió un fallo de seguridad en la función nl80211_set_rekey_data() en net/wireless/nl80211.c en el kernel de Linux hasta la versión 4.13.3. La función no comprueba si los atributos requeridos están presentes en una petición Netlink. • http://seclists.org/oss-sec/2017/q3/437 http://www.debian.org/security/2017/dsa-3981 http://www.securityfocus.com/bid/100855 https://bugzilla.novell.com/show_bug.cgi?id=1058410 https://bugzilla.redhat.com/show_bug.cgi?id=1491046 https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git/commit/?id=e785fa0a164aa11001cba931367c7f94ffaff888 https://marc.info/?t=150525503100001&r=1&w=2 https://usn.ubuntu.com/3583-1 https://usn.ubuntu.com/3583-2 • CWE-476: NULL Pointer Dereference •
CVSS: 6.0EPSS: 0%CPEs: 1EXPL: 0CVE-2017-12168
https://notcve.org/view.php?id=CVE-2017-12168
The access_pmu_evcntr function in arch/arm64/kvm/sys_regs.c in the Linux kernel before 4.8.11 allows privileged KVM guest OS users to cause a denial of service (assertion failure and host OS crash) by accessing the Performance Monitors Cycle Count Register (PMCCNTR). La función access_pmu_evcntr en arch/arm64/kvm/sys_regs.c en el kernel Linux en versiones anteriores a la 4.8.11 permite que los usuarios KVM invitados del sistema operativo provoquen una denegación de servicio (fallo de aserción y cierre inesperado del sistema operativo del host) accediendo a Performance Monitors Cycle Count Register (PMCCNTR). • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3f7a29694049edd728e2400ab57ad7553e5aa9 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.11 https://bugzilla.redhat.com/show_bug.cgi?id=1492984 https://github.com/torvalds/linux/commit/9e3f7a29694049edd728e2400ab57ad7553e5aa9 • CWE-617: Reachable Assertion •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-14340 – kernel: xfs: unprivileged user kernel oops
https://notcve.org/view.php?id=CVE-2017-14340
The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory. La macro XFS_IS_REALTIME_INODE en fs/xfs/xfs_linux.h en el kernel de Linux en versiones anteriores a la 4.13.2 no verifica que un sistema de archivos tenga un dispositivo realtime, lo que permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULL y OOPS) mediante vectores relacionados con la configuración de una marca RHINHERIT en un directorio. A flaw was found where the XFS filesystem code mishandles a user-settable inode flag in the Linux kernel prior to 4.14-rc1. This can cause a local denial of service via a kernel panic. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc http://seclists.org/oss-sec/2017/q3/436 http://www.debian.org/security/2017/dsa-3981 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2 http://www.securityfocus.com/bid/100851 https://access.redhat.com/errata/RHSA-2017:2918 https://bugzilla.redhat.com/show_bug.cgi?id=1491344 https://github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65cc https:&# • CWE-391: Unchecked Error Condition CWE-476: NULL Pointer Dereference •