CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-12192 – kernel: NULL pointer dereference due to KEYCTL_READ on negative key
https://notcve.org/view.php?id=CVE-2017-12192
The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation. La función keyctl_read_key en security/keys/keyctl.c en el subcomponente Key Management en el kernel de Linux en versiones anteriores a la 4.13.5 no considera correctamente que se puede tener una clave instanciada negativamente, lo que permite que los usuarios locales provoquen una denegación de servicio (OOPS y cierre inesperado del sistema) mediante una operación KEYCTL_READ manipulada. A vulnerability was found in the Key Management sub component of the Linux kernel, where when trying to issue a KEYTCL_READ on a negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 https://access.redhat.com/errata/RHSA-2018:0151 https://bugzilla.redhat.com/show_bug.cgi?id=1493435 https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678 https://lkml.org/lkml/2017/9/18/764 https://usn.ubuntu.com/3583-1 https://usn.ubuntu.com/3583-2 https://access.redhat.com • CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2017-12188 – Kernel: KVM: MMU potential stack buffer overrun during page walks
https://notcve.org/view.php?id=CVE-2017-12188
arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service (incorrect index during page walking, and host OS crash), aka an "MMU potential stack buffer overrun." arch/x86/kvm/mmu.c en el kernel de Linux hasta 4.13.5, cuando se utiliza la virtualización anidada, no atraviesa adecuadamente las entradas de la tabla de páginas invitadas para resolver una dirección virtual invitada, lo que permite a los usuarios del sistema operativo invitado L1 ejecutar código arbitrario en el sistema operativo host o provocar una denegación de servicio (índice incorrecto durante el recorrido de la página y falla del sistema operativo host), también conocido como "potencial desbordamiento de búfer en la región stack de la memoria de MMU". The Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization(nVMX) feature enabled (nested=1), was vulnerable to a stack buffer overflow issue. The vulnerability could occur while traversing guest page table entries to resolve guest virtual address(gva). An L1 guest could use this flaw to crash the host kernel resulting in denial of service (DoS) or potentially execute arbitrary code on the host to gain privileges on the system. • http://www.securityfocus.com/bid/101267 https://access.redhat.com/errata/RHSA-2018:0395 https://access.redhat.com/errata/RHSA-2018:0412 https://bugzilla.redhat.com/show_bug.cgi?id=1500380 https://patchwork.kernel.org/patch/9996579 https://patchwork.kernel.org/patch/9996587 https://access.redhat.com/security/cve/CVE-2017-12188 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-121: Stack-based Buffer Overflow •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-14991
https://notcve.org/view.php?id=CVE-2017-14991
The sg_ioctl function in drivers/scsi/sg.c in the Linux kernel before 4.13.4 allows local users to obtain sensitive information from uninitialized kernel heap-memory locations via an SG_GET_REQUEST_TABLE ioctl call for /dev/sg0. La función sg_ioctl en drivers/scsi/sg.c en el kernel de Linux en versiones anteriores a la 4.13.4 permite que los usuarios locales obtengan información sensible de zonas de la memoria dinámica del kernek no inicializadas mediante una llamada IOCTL SG_GET_REQUEST_TABLE a /dev/sg0. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3e0097499839e0fe3af380410eababe5a47c4cf9 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.4 http://www.securityfocus.com/bid/101187 https://github.com/torvalds/linux/commit/3e0097499839e0fe3af380410eababe5a47c4cf9 https://usn.ubuntu.com/3754-1 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-14954
https://notcve.org/view.php?id=CVE-2017-14954
The waitid implementation in kernel/exit.c in the Linux kernel through 4.13.4 accesses rusage data structures in unintended cases, which allows local users to obtain sensitive information, and bypass the KASLR protection mechanism, via a crafted system call. La implementación waitid en kernel/exit.c en el kernel de Linux hasta la versión 4.13.4 accede a estructuras de datos rusage en casos que no debería, lo que permite a los usuarios locales obtener información sensible y omitir el mecanismo de protección KASLR mediante una llamada al sistema manipulada. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6c85501f2fabcfc4fc6ed976543d252c4eaf4be9 https://github.com/torvalds/linux/commit/6c85501f2fabcfc4fc6ed976543d252c4eaf4be9 https://grsecurity.net/~spender/exploits/wait_for_kaslr_to_be_effective.c https://twitter.com/_argp/status/914021130712870912 https://twitter.com/grsecurity/status/914079864478666753 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
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 •