CVSS: 7.8EPSS: 0%CPEs: 6EXPL: 0CVE-2018-19962
https://notcve.org/view.php?id=CVE-2018-19962
An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because small IOMMU mappings are unsafely combined into larger ones. Se ha descubierto un problema en Xen hasta las versiones 4.11.x en plataformas AMD x86, que podría permitir que usuarios invitados del sistema operativo obtengan privilegios del host del sistema operativo. Esto se debe a que los mapeos de IOMMU pequeños se combinan de forma insegura con mapeos más grandes. • http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html http://www.securityfocus.com/bid/106182 https://lists.debian.org/debian-lts-announce/2019/10/msg00008.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT https://support.citrix.com/article/CTX239432 https://www.debian.org/security/2019/dsa-4369 https://xenbits.xen.org/xsa/advisory-275.html • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
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: 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 •