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CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0

18 Oct 2017 — An issue was discovered in Xen through 4.9.x allowing x86 HVM guest OS users to cause a denial of service (hypervisor crash) or possibly gain privileges because self-linear shadow mappings are mishandled for translated guests. Se ha descubierto un problema en Xen hasta las versiones 4.9.x que permite que usuarios invitados del sistema operativo x86 HMV provoquen una denegación de servicio (cierre inesperado del hipervisor) o que puedan obtener privilegios debido a que se gestiona de manera incorrecta los ma... • http://www.securityfocus.com/bid/101513 • CWE-668: Exposure of Resource to Wrong Sphere •

CVSS: 5.5EPSS: 0%CPEs: 51EXPL: 0

13 Sep 2017 — Memory leak in Xen 3.3 through 4.8.x allows guest OS users to cause a denial of service (ARM or x86 AMD host OS memory consumption) by continually rebooting, because certain cleanup is skipped if no pass-through device was ever assigned, aka XSA-207. Una vulnerabilidad de fuga de memoria en Xen desde la versión 3.3 hasta las 4.8.x permite que usuarios invitados del sistema operativo provoquen una denegación de servicio (consumo de memoria del sistema operativo host ARM o x86 AMD) debido a que se salta una s... • https://lists.debian.org/debian-lts-announce/2018/09/msg00006.html • CWE-772: Missing Release of Resource after Effective Lifetime •

CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0

12 Sep 2017 — A parameter verification issue was discovered in Xen through 4.9.x. The function `alloc_heap_pages` allows callers to specify the first NUMA node that should be used for allocations through the `memflags` parameter; the node is extracted using the `MEMF_get_node` macro. While the function checks to see if the special constant `NUMA_NO_NODE` is specified, it otherwise does not handle the case where `node >= MAX_NUMNODES`. This allows an out-of-bounds access to an internal array. Existe un problema de verific... • http://www.securityfocus.com/bid/100818 • CWE-125: Out-of-bounds Read •

CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0

12 Sep 2017 — A grant unmapping issue was discovered in Xen through 4.9.x. When removing or replacing a grant mapping, the x86 PV specific path needs to make sure page table entries remain in sync with other accounting done. Although the identity of the page frame was validated correctly, neither the presence of the mapping nor page writability were taken into account. Se ha descubierto un problema de desasignación de concesión en Xen hasta la versión 4.9.x. Cuando se elimina o reemplaza una asignación de concesión, la r... • http://www.securityfocus.com/bid/100819 •

CVSS: 5.6EPSS: 0%CPEs: 1EXPL: 0

12 Sep 2017 — A domain cleanup issue was discovered in the C xenstore daemon (aka cxenstored) in Xen through 4.9.x. When shutting down a VM with a stubdomain, a race in cxenstored may cause a double-free. The xenstored daemon may crash, resulting in a DoS of any parts of the system relying on it (including domain creation / destruction, ballooning, device changes, etc.). Se ha descubierto un problema de limpieza de dominio en el demonio C xenstore (también conocido como cxenstored) en Xen hasta la versión 4.9.x. Cuando s... • http://www.securityfocus.com/bid/100826 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 10.0EPSS: 4%CPEs: 1EXPL: 0

05 Jul 2017 — Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host OS access, aka XSA-222. Xen, hasta las versiones 4.8.x, no valida las asignaciones de memoria durante ciertas operaciones de P2M, lo que permite que los usuarios invitados del sistema operativo obtengan acceso privilegiado al sistema operativo. Esto también se conoce como XSA-222. Multiple vulnerabilities have been found in Xen, the worst of which may allow local attack... • http://www.debian.org/security/2017/dsa-3969 • CWE-20: Improper Input Validation •

CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0

05 Jul 2017 — Xen through 4.8.x mishandles virtual interrupt injection, which allows guest OS users to cause a denial of service (hypervisor crash), aka XSA-223. Xen hasta la versión 4.8.x, maneja inapropiadamente la inyección de interrupción virtual, que permite a los usuarios del sistema operativo invitado causar una denegación de servicio (bloqueo del hypervisor), también se conoce como XSA-223. • http://www.debian.org/security/2017/dsa-3969 •

CVSS: 9.8EPSS: 1%CPEs: 1EXPL: 0

05 Jul 2017 — The grant-table feature in Xen through 4.8.x provides false mapping information in certain cases of concurrent unmap calls, which allows backend attackers to obtain sensitive information or gain privileges, aka XSA-218 bug 1. La característica de tabla grant en Xen, hasta las versiones 4.8.x, ofrece información de mapeo falsa en ciertos casos de llamadas simultáneas de desasignación, lo que permite que atacantes del backend obtengan información sensible o adquieran privilegios. Esto también se conoce como X... • http://www.debian.org/security/2017/dsa-3969 •

CVSS: 10.0EPSS: 2%CPEs: 1EXPL: 0

05 Jul 2017 — The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unmapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 1. La característica de tabla grant en Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta un mapeo de GNTMAP_device_map y GNTMAP_host_map cuando este va seguido únicamente de una desasignació... • http://www.debian.org/security/2017/dsa-3969 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •

CVSS: 10.0EPSS: 2%CPEs: 1EXPL: 0

05 Jul 2017 — The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2. La característica de tabla grant en Xen, hasta las versiones 4.8.x, no asegura que se realicen los conteos de tipos suficientes para un mapeo de GNTMAP_device_map y GNTMAP_host_map, lo que permite que los usuarios invi... • http://www.debian.org/security/2017/dsa-3969 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •