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

CVE-2017-14319 – Debian Security Advisory 4050-1

https://notcve.org/view.php?id=CVE-2017-14319

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: 7.8EPSS: 0%CPEs: 21EXPL: 0

CVE-2017-12136 – Gentoo Linux Security Advisory 201801-14

https://notcve.org/view.php?id=CVE-2017-12136

24 Aug 2017 — Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling. Una condición de carrera en el código de tabla de concesiones en Xen 4.6.x a 4.9.x permite que administradores invitados locales del sistema operativo provoquen una denegación de servicio (corrupción de lista libre y bloqueo del host) o que obtengan beneficios... • http://www.debian.org/security/2017/dsa-3969 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 6.5EPSS: 0%CPEs: 18EXPL: 0

CVE-2017-12855

https://notcve.org/view.php?id=CVE-2017-12855

15 Aug 2017 — Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensi... • http://www.debian.org/security/2017/dsa-3969 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •

CVSS: 10.0EPSS: 3%CPEs: 1EXPL: 0

CVE-2017-10912 – Gentoo Linux Security Advisory 201710-17

https://notcve.org/view.php?id=CVE-2017-10912

05 Jul 2017 — Xen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka XSA-217. Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta la transferencia de páginas, lo que permite que los usuarios invitados del sistema operativo obtengan acceso privilegiado al sistema operativo. Esto también se conoce como XSA-217. Multiple vulnerabilities have been found in Xen, the worst of which may allow local attackers to escalate privileges. Versions less than 4.7.3 are ... • http://www.debian.org/security/2017/dsa-3969 •

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

CVE-2017-10913 – Gentoo Linux Security Advisory 201710-17

https://notcve.org/view.php?id=CVE-2017-10913

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: 8.1EPSS: 0%CPEs: 1EXPL: 0

CVE-2017-10914 – Gentoo Linux Security Advisory 201710-17

https://notcve.org/view.php?id=CVE-2017-10914

05 Jul 2017 — The grant-table feature in Xen through 4.8.x has a race condition leading to a double free, which allows guest OS users to cause a denial of service (memory consumption), or possibly obtain sensitive information or gain privileges, aka XSA-218 bug 2. La característica de tabla grant en Xen, hasta las versiones 4.8.x, incluye una condición de carrera que da lugar a una doble liberación (double free). Esto permite que los usuarios invitados del sistema operativo provoquen una denegación de servicio (consumo d... • http://www.debian.org/security/2017/dsa-3969 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-415: Double Free •

CVSS: 9.0EPSS: 0%CPEs: 1EXPL: 0

CVE-2017-10915 – Gentoo Linux Security Advisory 201710-17

https://notcve.org/view.php?id=CVE-2017-10915

05 Jul 2017 — The shadow-paging feature in Xen through 4.8.x mismanages page references and consequently introduces a race condition, which allows guest OS users to obtain Xen privileges, aka XSA-219. La característica de shadow-paging en Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta referencias de páginas y, en consecuencia, introduce una condición de carrera, lo que permite que los usuarios invitados del sistema operativo obtengan privilegios Xen. Esto también se conoce como XSA-219. Multiple vulnerabil... • http://www.debian.org/security/2017/dsa-3969 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 7.5EPSS: 0%CPEs: 13EXPL: 0

CVE-2017-10916

https://notcve.org/view.php?id=CVE-2017-10916

05 Jul 2017 — The vCPU context-switch implementation in Xen through 4.8.x improperly interacts with the Memory Protection Extensions (MPX) and Protection Key (PKU) features, which makes it easier for guest OS users to defeat ASLR and other protection mechanisms, aka XSA-220. La implementación context-switch de vCPU en Xen hasta la versión 4.8.x, interactúa inapropiadamente con las funcionalidades Memory Protection Extensions (MPX) y Protection Key (PKU), lo que facilita a los usuarios del sistema operativo invitado super... • http://www.debian.org/security/2017/dsa-3969 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •

CVSS: 9.4EPSS: 0%CPEs: 1EXPL: 0

CVE-2017-10917

https://notcve.org/view.php?id=CVE-2017-10917

05 Jul 2017 — Xen through 4.8.x does not validate the port numbers of polled event channel ports, which allows guest OS users to cause a denial of service (NULL pointer dereference and host OS crash) or possibly obtain sensitive information, aka XSA-221. Xen hasta la versión 4.8.x, no comprueba los números de puerto de los puertos del canal de eventos sondeados, lo que permite a los usuarios del sistema operativo invitado causar una denegación de servicio (desreferencia del puntero NULL y bloqueo del sistema operativo de... • http://www.debian.org/security/2017/dsa-3969 • CWE-476: NULL Pointer Dereference •

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

CVE-2017-10918 – Gentoo Linux Security Advisory 201710-17

https://notcve.org/view.php?id=CVE-2017-10918

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 •