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CVSS: 8.8EPSS: 0%CPEs: 9EXPL: 0

Xen allows local OS guest users to cause a denial of service (crash) or possibly obtain sensitive information or gain privileges via vectors involving transitive grants. Xen permite que usuarios locales invitados del sistema operativo provoquen una denegación de servicio (bloqueo) o que tengan la posibilidad de obtener información sensible u obtener privilegios mediante vectores relacionados con concesiones transitivas. • http://www.debian.org/security/2017/dsa-3969 http://www.openwall.com/lists/oss-security/2017/08/15/1 http://www.openwall.com/lists/oss-security/2017/08/17/6 http://www.openwall.com/lists/oss-security/2020/04/14/4 http://www.securityfocus.com/bid/100344 http://www.securitytracker.com/id/1039178 http://xenbits.xen.org/xsa/advisory-226.html https://bugzilla.redhat.com/show_bug.cgi?id=1477655 https://security.gentoo.org/glsa/201801-14 https://support.cit • CWE-682: Incorrect Calculation •

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

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: 8.8EPSS: 0%CPEs: 9EXPL: 0

arch/x86/mm.c in Xen allows local PV guest OS users to gain host OS privileges via vectors related to map_grant_ref. arch/x86/mm.c en Xen permite que usuarios locales PV del sistema operativo obtengan privilegios SO del host mediante vectores relacionados con map_grant_ref. • http://www.debian.org/security/2017/dsa-3969 http://www.openwall.com/lists/oss-security/2017/08/15/2 http://www.securityfocus.com/bid/100342 http://www.securitytracker.com/id/1039174 http://xenbits.xen.org/xsa/advisory-227.html https://bugzilla.redhat.com/show_bug.cgi?id=1477657 https://security.gentoo.org/glsa/201801-14 https://support.citrix.com/article/CTX225941 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •

CVSS: 9.9EPSS: 0%CPEs: 32EXPL: 0

Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process. Quick emulator (QEMU) en versiones anteriores a la 2.8 construido con el soporte del emulador Cirrus CLGD 54xx VGA Emulator es vulnerable a un problema de acceso fuera de límites. El problema puede ocurrir al copiar datos VGA en cirrus_bitblt_cputovideo. • http://rhn.redhat.com/errata/RHSA-2017-0328.html http://rhn.redhat.com/errata/RHSA-2017-0329.html http://rhn.redhat.com/errata/RHSA-2017-0330.html http://rhn.redhat.com/errata/RHSA-2017-0331.html http://rhn.redhat.com/errata/RHSA-2017-0332.html http://rhn.redhat.com/errata/RHSA-2017-0333.html http://rhn.redhat.com/errata/RHSA-2017-0334.html http://rhn.redhat.com/errata/RHSA-2017-0350.html http://rhn.redhat.com/errata/RHSA-2017-0351.html http://rhn • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •

CVSS: 9.1EPSS: 0%CPEs: 29EXPL: 0

Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host. Quick emulator (QEMU) con soporte integrado para el emulador Cirrus CLGD 54xx VGA es vulnerable a un problema de acceso fuera de límites. Podría ocurrir mientras se copian datos VGA mediante la copia bitblt en modo backward. • http://rhn.redhat.com/errata/RHSA-2017-0309.html http://rhn.redhat.com/errata/RHSA-2017-0328.html http://rhn.redhat.com/errata/RHSA-2017-0329.html http://rhn.redhat.com/errata/RHSA-2017-0330.html http://rhn.redhat.com/errata/RHSA-2017-0331.html http://rhn.redhat.com/errata/RHSA-2017-0332.html http://rhn.redhat.com/errata/RHSA-2017-0333.html http://rhn.redhat.com/errata/RHSA-2017-0334.html http://rhn.redhat.com/errata/RHSA-2017-0344.html http://rhn • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •