CVSS: 7.8EPSS: 0%CPEs: 21EXPL: 0CVE-2017-12136
https://notcve.org/view.php?id=CVE-2017-12136
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 en el host mediante vectores que impliquen la gestión de lista libre de maptrack. • http://www.debian.org/security/2017/dsa-3969 http://www.openwall.com/lists/oss-security/2017/08/15/3 http://www.securityfocus.com/bid/100346 http://www.securitytracker.com/id/1039175 http://xenbits.xen.org/xsa/advisory-228.html https://bugzilla.redhat.com/show_bug.cgi?id=1477651 https://security.gentoo.org/glsa/201801-14 https://support.citrix.com/article/CTX225941 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 6.5EPSS: 0%CPEs: 18EXPL: 0CVE-2017-12855
https://notcve.org/view.php?id=CVE-2017-12855
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 sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected. • http://www.debian.org/security/2017/dsa-3969 http://www.securityfocus.com/bid/100341 http://www.securitytracker.com/id/1039177 http://xenbits.xen.org/xsa/advisory-230.html https://support.citrix.com/article/CTX225941 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 0CVE-2017-10922
https://notcve.org/view.php?id=CVE-2017-10922
The grant-table feature in Xen through 4.8.x mishandles MMIO region grant references, which allows guest OS users to cause a denial of service (loss of grant trackability), aka XSA-224 bug 3. La característica de tabla grant en Xen, hasta las versiones 4.8.x, gestiona de manera incorrecta referencias grant de la región MMIO, lo que permite que los usuarios invitados de sistema operativo provoquen una denegación de servicio (pérdida de trazabilidad de grant, también conocido como XSA-224, fallo 3. • http://www.debian.org/security/2017/dsa-3969 http://www.securitytracker.com/id/1038734 https://security.gentoo.org/glsa/201708-03 https://security.gentoo.org/glsa/201710-17 https://xenbits.xen.org/xsa/advisory-224.html • CWE-400: Uncontrolled Resource Consumption •
CVSS: 9.4EPSS: 0%CPEs: 1EXPL: 0CVE-2017-10917
https://notcve.org/view.php?id=CVE-2017-10917
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 del host) o posiblemente obtener información confidencial, también se conoce como XSA-221. • http://www.debian.org/security/2017/dsa-3969 http://www.securityfocus.com/bid/99157 http://www.securitytracker.com/id/1038731 https://security.gentoo.org/glsa/201708-03 https://xenbits.xen.org/xsa/advisory-221.html • CWE-476: NULL Pointer Dereference •
CVSS: 10.0EPSS: 0%CPEs: 1EXPL: 0CVE-2017-10920
https://notcve.org/view.php?id=CVE-2017-10920
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 desasignación (unmapping) de GNTMAP_host_map, lo que permite que los usuarios invitados del sistema operativo provoquen una denegación de servicio (mala gestión del conteo y corrupción de memoria) u obtengan privilegios de acceso al sistema operativo anfitrión. Esto también se conoce como XSA-224, fallo 1. • http://www.debian.org/security/2017/dsa-3969 http://www.securitytracker.com/id/1038734 https://security.gentoo.org/glsa/201708-03 https://security.gentoo.org/glsa/201710-17 https://xenbits.xen.org/xsa/advisory-224.html • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •