CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2018-19967
https://notcve.org/view.php?id=CVE-2018-19967
An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of certain HLE transactions associated with the KACQUIRE instruction prefix. Se ha descubierto un problema en Xen hasta las versiones 4.11.x en plataformas Intel x86 que permite que los usuarios del sistema operativo invitados provoquen una denegación de servicio (bloqueo del sistema operativo del host) debido a que Xen no soluciona la gestion incorrecta por parte de Intel de ciertas transacciones HLE asociadas con el prefijo de instrucción KACQUIRE. • http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00057.html http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html http://www.securityfocus.com/bid/106182 https://support.citrix.com/article/CTX239432 https://www.debian.org/security/2019/dsa-4369 https://xenbits.xen.org/xsa/advisory-282.html • CWE-20: Improper Input Validation •
CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0CVE-2018-18883
https://notcve.org/view.php?id=CVE-2018-18883
An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted. Se ha descubierto un problema en Xen desde las versiones 4.9.x hasta las 4.11.x. en plataformas Intel x86, lo que permite que los invitados x86 HVM y PVH provoquen una denegación de servicio (desreferencia de puntero NULL) del sistema operativo u otro tipo de impacto sin especificar debido a que el VT-x anidado no está correctamente restringido. • http://www.securityfocus.com/bid/105817 http://www.securitytracker.com/id/1042021 https://xenbits.xen.org/xsa/advisory-278.html • CWE-476: NULL Pointer Dereference •
CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2018-15470
https://notcve.org/view.php?id=CVE-2018-15470
An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. • http://xenbits.xen.org/xsa/advisory-272.html https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html https://security.gentoo.org/glsa/201810-06 • CWE-400: Uncontrolled Resource Consumption •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2018-15471
https://notcve.org/view.php?id=CVE-2018-15471
An issue was discovered in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c in the Linux kernel through 4.18.1, as used in Xen through 4.11.x and other products. The Linux netback driver allows frontends to control mapping of requests to request queues. When processing a request to set or change this mapping, some input validation (e.g., for an integer overflow) was missing or flawed, leading to OOB access in hash handling. A malicious or buggy frontend may cause the (usually privileged) backend to make out of bounds memory accesses, potentially resulting in one or more of privilege escalation, Denial of Service (DoS), or information leaks. Se descubrió un problema en xenvif_set_hash_mapping en drivers/net/xen-netback/hash.c en el kernel de Linux hasta la versión 4.18.1, tal y como se utiliza en Xen hasta las versiones 4.11.x y otros productos. • http://xenbits.xen.org/xsa/advisory-270.html https://bugs.chromium.org/p/project-zero/issues/detail?id=1607 https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html https://usn.ubuntu.com/3819-1 https://usn.ubuntu.com/3820-1 https://usn.ubuntu.com/3820-2 https://usn.ubuntu.com/3820-3 https://www.debian.org/security/2018/dsa-4313 • CWE-125: Out-of-bounds Read •
CVSS: 6.0EPSS: 0%CPEs: 1EXPL: 0CVE-2018-15468
https://notcve.org/view.php?id=CVE-2018-15468
An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. • http://xenbits.xen.org/xsa/advisory-269.html https://security.gentoo.org/glsa/201810-06 • CWE-863: Incorrect Authorization •