EUVD-2020-18275

Malware in sbrugna...

EUVD-2020-21932

Malware in sbrugna...

K17120: Linux kernel vulnerability CVE-2014-8134

Security Advisory Description The paravirtopssetup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirtenabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that rea...

SUSE CVE-2013-1920

Xen 4.2.x, 4.1.x, and earlier, when the hypervisor is running "under memory pressure" and the Xen Security Module XSM is enabled, uses the wrong ordering of operations when extending the per-domain event channel tracking table, which causes a use-after-free and allows local guest kernels to injec...

Design/Logic Flaw

x86: Speculative vulnerabilities with bare non-shim 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to...

SUSE: Security Advisory (SUSE-SU-2019:0825-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

ALPINE-CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

UBUNTU-CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

PT-2020-6149

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.14.x Description An issue was discovered in Xen where the recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the forme...

CVE-2020-29570: Allocation of Resources Without Limits or Throttling

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels c...

x86 PV guest INVLPG-like flushes may leave stale TLB entries

ISSUE DESCRIPTION x86 PV guest kernels may use hypercalls with INVLPG-like behavior to invalidate TLB entries even after changes to non-leaf page tables. Such changes to non-leaf page tables will, however, also render stale possible TLB entries created by Xen's internal use of linear page tables ...

Denial Of Service (DoS)

xen is vulnerable to denial of service DoS. An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a GP fault, and...

Denial Of Service (DoS)

xen is vulnerable to denial of service DoS. There is a lack of preemption in evtchnreset / evtchndestroy. In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning up...

CVE-2020-25601

An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchnreset / evtchndestroy. In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning...

CVE-2020-25596

An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a GP fault, and incorrectly delivers it twice to the guest...

CVE-2020-25601

An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchnreset / evtchndestroy. In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning...

Xen Denial of Service vulnerability (XSA-304)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a denial of service vulnerability. An erratum exists across some CPUs whereby an instruction fetch may cause a machine check error if the pagetables have been updated in a specific manner...

x86: Machine Check Error on Page Size Change DoS

ISSUE DESCRIPTION An erratum exists across some CPUs whereby an instruction fetch may cause a machine check error if the pagetables have been updated in a specific manner without invalidating the TLB. The x86 architecture explicitly permits modification of the pagetables without TLB invalidation,...

CVE-2019-17347

An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux and possibly other guest kernels...