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 •
CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2018-15469
https://notcve.org/view.php?id=CVE-2018-15469
An issue was discovered in Xen through 4.11.x. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash). Se ha descubierto un problema en Xen hasta las versiones 4.11.x. • http://xenbits.xen.org/xsa/advisory-268.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: 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: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2018-14678
https://notcve.org/view.php?id=CVE-2018-14678
An issue was discovered in the Linux kernel through 4.17.11, as used in Xen through 4.11.x. The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S does not properly maintain RBX, which allows local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges. Se ha descubierto un problema en el kernel de Linux hasta la versión 4.17.11, tal y como se utiliza en Xen hasta las versiones 4.11.x. El punto de entrada de xen_failsafe_callback en arch/x86/entry/entry_64.S no mantiene correctamente el RBX, lo que permite a los usuarios locales provocar una denegación de servicio (uso de memoria no inicializada y cierre inesperado del sistema). • http://www.securityfocus.com/bid/104924 http://www.securitytracker.com/id/1041397 https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html https://usn.ubuntu.com/3931-1 https://usn.ubuntu.com/3931-2 https://www.debian.org/security/2018/dsa-4308 https://xenbits.xen.org/xsa/advisory-274.html • CWE-665: Improper Initialization •