CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2011-2519 – kernel: xen: x86_emulate: fix SAHF emulation
https://notcve.org/view.php?id=CVE-2011-2519
Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction. Xen en el kernel de Linux, al ejecutar como invitado en una máquina sin paginación asistida por hardware (HAP), permite a usuarios invitados causar denegación de servicio (referencia a puntero inválido y caída del hipervisor) a través de la instrucción SAHF. • http://rhn.redhat.com/errata/RHSA-2011-1212.html http://www.openwall.com/lists/oss-security/2011/08/30/1 http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 https://bugzilla.redhat.com/show_bug.cgi?id=718882 https://access.redhat.com/security/cve/CVE-2011-2519 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 19EXPL: 0CVE-2011-1166 – kernel: xen: x86_64: fix error checking in arch_set_info_guest()
https://notcve.org/view.php?id=CVE-2011-1166
Xen, possibly before 4.0.2, allows local 64-bit PV guests to cause a denial of service (host crash) by specifying user mode execution without user-mode pagetables. Xen, probablemente anterior a v4.0.2 permite a invitados locales de 64-bit PV provocar una denegación de servicio (caída del host) especificando la ejecución en modo usuario sin las tablas de página. • http://downloads.avaya.com/css/P8/documents/100145416 http://rhn.redhat.com/errata/RHSA-2011-0833.html http://wiki.xen.org/wiki/Security_Announcements#XSA-1_Host_crash_due_to_failure_to_correctly_validate_PV_kernel_execution_state. https://access.redhat.com/security/cve/CVE-2011-1166 https://bugzilla.redhat.com/show_bug.cgi?id=688579 • CWE-20: Improper Input Validation •
CVSS: 6.1EPSS: 0%CPEs: 19EXPL: 0CVE-2010-4255 – xen: 64-bit PV xen guest can crash host by accessing hypervisor per-domain memory area
https://notcve.org/view.php?id=CVE-2010-4255
The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access. La función fixup_page_fault en arch/x86/traps.c en Xen v.4.0.1 y anteriores sobre plataformas 64-bit, cuando se activa la paravirtualización, no verifica que el modo kernel está usado para llamar a la función handle_gdt_ldt_mapping_fault, lo que permite a los usuarios invitados del sistema operativo provocar una denegación de servicio (host OS BUG_ON) a través de un acceso de memoria manipulado. • http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html http://openwall.com/lists/oss-security/2010/11/30/5 http://openwall.com/lists/oss-security/2010/11/30/8 http://secunia.com/advisories/42884 http://secunia.com/advisories/46397 http://www.redhat.com/support/errata/RHSA-2011-0017.html http://www.securityfocus.com/archive/1/520102/100/0/threaded http://www.vmware.com/security/advisories/VMSA-2011-0012.html https://bugzilla.redhat.com/show_bug •
CVSS: 5.5EPSS: 0%CPEs: 13EXPL: 0CVE-2010-4247 – xen: request-processing loop is unbounded in blkback
https://notcve.org/view.php?id=CVE-2010-4247
The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information. La función do_block_io_op en (1) ldrivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c en Xen anterior a v3.4.0 para el kernel Linux v2.6.18, y posiblemente otras versiones, permite a los usuarios invitados del sistema operativo causar una denegación de servicio (bucle infinito y el consumo de CPU) a través de un gran índice de producción de peticiones a los controladores blkback o blktap back-end. NOTA: algunos de estos detalles han sido obtenidos de información de terceros. • http://secunia.com/advisories/35093 http://secunia.com/advisories/42789 http://secunia.com/advisories/46397 http://www.openwall.com/lists/oss-security/2010/11/23/1 http://www.openwall.com/lists/oss-security/2010/11/24/8 http://www.redhat.com/support/errata/RHSA-2011-0004.html http://www.securityfocus.com/archive/1/520102/100/0/threaded http://www.securityfocus.com/bid/45029 http://www.vmware.com/security/advisories/VMSA-2011-0012.html http://www.vupen.com/ • CWE-20: Improper Input Validation •
CVSS: 2.7EPSS: 0%CPEs: 16EXPL: 0CVE-2010-3699 – kernel: guest->host denial of service from invalid xenbus transitions
https://notcve.org/view.php?id=CVE-2010-3699
The backend driver in Xen 3.x allows guest OS users to cause a denial of service via a kernel thread leak, which prevents the device and guest OS from being shut down or create a zombie domain, causes a hang in zenwatch, or prevents unspecified xm commands from working properly, related to (1) netback, (2) blkback, or (3) blktap. El driver backend en Xen v3.x permite a usuarios del OS causar una denegación de servicio a través de una fuga en el hilo del kernel, lo que evita que el dispositivo y el invitado OS sean apagados o se cree un dominio zombie, causando una caída en zenwatch, o impida que comandos sin especificar xm trabajen de forma adecuada, relacionado con (1) netback, (2) blkback, o (3) blktap. • http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html http://secunia.com/advisories/42372 http://secunia.com/advisories/42789 http://secunia.com/advisories/43056 http://secunia.com/advisories/46397 http://www.redhat.com/support/errata/RHSA-2011-0004.html http://www.securityfocus.com/archive/1/520102/100/0/threaded http://www.securityfocus.com/bid/45039 http://www.securitytracker.com/id?1024786 http://www.vmware.com/security/advisories/VMSA-2011-0012.html ht • CWE-399: Resource Management Errors •