CVSS: 5.4EPSS: 0%CPEs: 21EXPL: 0CVE-2014-8594
https://notcve.org/view.php?id=CVE-2014-8594
The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP). La función do_mmu_update en arch/x86/mm.c en Xen 4.x hasta la versión 4.4.x no restringe adecuadamente las actualizaciones a las tablas de página sólo para PV, lo que permite a invitados PV remotos provocar una denegación de servicio (referencia a puntero NULL) aprovechando los servicios de emulación de hardware para invitados HVM que utilizan Hardware Assisted Paging (HAP). • http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html http://secunia.com/advisories/62672 http://www.debian.org/security/2015/dsa-3140 http://www.securityfocus.com/bid/71149 http://xenbits.xen.org/xsa/advisory-109.html https://exchange.xforce.ibmcloud.com/vulnerabilities/98767 https://security.gentoo.org/glsa/201504-04 • CWE-20: Improper Input Validation •
CVSS: 1.9EPSS: 0%CPEs: 33EXPL: 0CVE-2014-8595
https://notcve.org/view.php?id=CVE-2014-8595
arch/x86/x86_emulate/x86_emulate.c in Xen 3.2.1 through 4.4.x does not properly check privileges, which allows local HVM guest users to gain privileges or cause a denial of service (crash) via a crafted (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, or (6) LRET far branch instruction. El fichero arch/x86/x86_emulate.c in Xen 3.2.1 hasta 4.4.x no comprueba correctamente los privilegios, lo que permite a los usuarios invitados HVM locales conseguir privilegios o causar una denegación de servicio (caída) a través de una instrucción manipulada de rama lejana (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, o (6) LRET. • http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html http://secunia.com/advisories/62537 http://secunia.com/advisories/62672 http://support.citrix.com/article/CTX200288 http://support.citrix.com/article/CTX201794 http://www.debian.org/security/2015/dsa-3140 http://www.securityfocus.com/bid/71151 http://xenbits.xen.org/xsa/advisory-110.html https://exchange.xforce.ibmcloud.com/vulnerabilities&#x • CWE-17: DEPRECATED: Code •
CVSS: 6.1EPSS: 0%CPEs: 21EXPL: 0CVE-2014-7154
https://notcve.org/view.php?id=CVE-2014-7154
Race condition in HVMOP_track_dirty_vram in Xen 4.0.0 through 4.4.x does not ensure possession of the guarding lock for dirty video RAM tracking, which allows certain local guest domains to cause a denial of service via unspecified vectors. Condición de carrera en HVMOP_track_dirty_vram en Xen 4.0.0 hasta 4.4.x no asegura la posesión del bloqueo de guardar para el seguimiento RAM de vídeos sucios, lo que permite a dominios locales de huésped causar una denegación de servicio a través de vectores no especificados. • http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html http://secunia.com/advisories/61501 http://secunia.com/advisories/61890 http://security.gentoo.org/glsa/glsa-201412-42.xml http://www.debian.org/security/2014/dsa-3041 http://www. • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 5.8EPSS: 0%CPEs: 43EXPL: 0CVE-2014-7155
https://notcve.org/view.php?id=CVE-2014-7155
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction. La función x86_emulate en arch/x86/x86_emulate/x86_emulate.c en Xen 4.4.x y anteriores no comprueba debidamente los permisos del modo de supervisor, lo que permite a usuarios locales de HVM causar una denegación de servicio (caída del huésped) o ganar privilegios del medo del kernel del huésped a través de vectores que involucran una instrucción (1) HLT, (2) LGDT, (3) LIDT, o (4) LMSW. • http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html http://secunia.com/advisories/61858 http://secunia.com/advisories/61890 http://security.gentoo.org/glsa/glsa-201412-42.xml http://support.citrix.com/article/CTX200218 http://www.debian. • CWE-264: Permissions, Privileges, and Access Controls •
CVSS: 3.3EPSS: 0%CPEs: 19EXPL: 0CVE-2014-7156
https://notcve.org/view.php?id=CVE-2014-7156
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors. La función x86_emulate en arch/x86/x86_emulate/x86_emulate.c en Xen 3.3.x hasta 4.4.x no comprueba los permisos del modo de supervisión para las instrucciones que generan interrupciones de software, lo que permite a usuarios locales huéspedes de HVM causar una denegación de servicio (caída del huésped) a través de vectores no especificados. • http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html http://secunia.com/advisories/61500 http://secunia.com/advisories/61858 http://secunia.com/advisories/61890 http://security.gentoo.org/glsa/glsa-201412-42.xml http://support.citrix.com • CWE-264: Permissions, Privileges, and Access Controls •