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

An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to gain privileges on the host OS, obtain sensitive information, or cause a denial of service (BUG and host OS crash) by leveraging the mishandling of Populate on Demand (PoD) Physical-to-Machine (P2M) errors. Se ha descubierto un problema en Xen hasta la versión 4.9.x que permite que los usuarios invitados HVM del sistema operativo obtengan privilegios en el host del sistema operativo, obtengan información sensible o provoquen una denegación de servicio (error y cierre inesperado del host del sistema operativo) aprovechando la gestión incorrecta de errores PoD (Populate on Demand) P2M (Physical-to-Machine). • http://www.securityfocus.com/bid/102013 http://www.securityfocus.com/bid/102129 http://www.securitytracker.com/id/1039879 https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html https://lists.debian.org/debian-lts-announce/2018/10/msg00021.html https://security.gentoo.org/glsa/201801-14 https://support.citrix.com/article/CTX230138 https://xenbits.xen.org/xsa/advisory-247.html • CWE-416: Use After Free •

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

An issue was discovered in Xen through 4.9.x on the ARM platform allowing guest OS users to obtain sensitive information from DRAM after a reboot, because disjoint blocks, and physical addresses that do not start at zero, are mishandled. Se ha descubierto un problema en Xen hasta la versión 4.9.x en la plataforma ARM que permite que usuarios invitados del sistema operativo obtengan información sensible del DRAM tras un reinicio, ya que se gestionan de manera incorrecta los bloques no contiguos y las direcciones físicas que no empiezan en cero. • https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html https://security.gentoo.org/glsa/201801-14 https://xenbits.xen.org/xsa/advisory-245.html • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •

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

An issue was discovered in Xen through 4.9.x allowing HVM guest OS users to cause a denial of service (infinite loop and host OS hang) by leveraging the mishandling of Populate on Demand (PoD) errors. Se ha descubierto un problema en Xen hasta la versión 4.9.x que permite que los usuarios invitados HVM del sistema operativo provoquen una denegación de servicio (bucle infinito y bloqueo del host del sistema operativo) aprovechando la gestión incorrecta de errores PoD (Populate on Demand). • http://www.securityfocus.com/bid/102008 http://www.securityfocus.com/bid/102129 http://www.securityfocus.com/bid/105954 http://www.securitytracker.com/id/1039878 https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html https://lists.debian.org/debian-lts-announce/2018/10/msg00021.html https://security.gentoo.org/glsa/201801-14 https://support.citrix.com/article/CTX230138 https://xenbits.xen.org/xsa/advisory-246.html • CWE-754: Improper Check for Unusual or Exceptional Conditions CWE-755: Improper Handling of Exceptional Conditions CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •

CVSS: 9.1EPSS: 0%CPEs: 1EXPL: 0

An issue was discovered in Xen through 4.9.x. Grant copying code made an implication that any grant pin would be accompanied by a suitable page reference. Other portions of code, however, did not match up with that assumption. When such a grant copy operation is being done on a grant of a dying domain, the assumption turns out wrong. A malicious guest administrator can cause hypervisor memory corruption, most likely resulting in host crash and a Denial of Service. • http://www.openwall.com/lists/oss-security/2017/10/24/3 http://www.securityfocus.com/bid/101564 http://www.securitytracker.com/id/1039653 http://xenbits.xen.org/xsa/advisory-236.html https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html https://support.citrix.com/article/CTX229057 https://www.debian.org/security/2017/dsa-4050 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •

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

An issue was discovered in Xen through 4.9.x allowing x86 PV guest OS users to cause a denial of service (memory leak) because reference counts are mishandled. Se ha descubierto un problema en Xen hasta las versiones 4.9.x que permite que usuarios invitados del sistema operativo x86 PV provoquen una denegación de servicio (fuga de memoria) debido a que se gestiona de manera incorrecta el recuento de referencias. • http://www.securitytracker.com/id/1039568 https://lists.debian.org/debian-lts-announce/2017/11/msg00027.html https://lists.debian.org/debian-lts-announce/2018/10/msg00021.html https://security.gentoo.org/glsa/201801-14 https://support.citrix.com/article/CTX228867 https://www.debian.org/security/2017/dsa-4050 https://xenbits.xen.org/xsa/advisory-242.html • CWE-772: Missing Release of Resource after Effective Lifetime •