CVE-2020-25599

An issue was discovered in Xen through 4.14.x. There are evtchnreset race conditions. Uses of EVTCHNOPreset potentially by a guest on itself or XENDOMCTLsoftreset by itself covered by XSA-77 can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses ...

races with evtchn_reset()

ISSUE DESCRIPTION Uses of EVTCHNOPreset potentially by a guest on itself or XENDOMCTLsoftreset by itself covered by XSA-77 can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. IMPACT In particular x86 PV guests may ...

x86 pv guest kernel DoS via SYSENTER

ISSUE DESCRIPTION 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. This causes the guest kernel to observe a kernel-privilege GP fault typically fatal rather than ...

x86 pv: Crash when handling guest access to MSR_MISC_ENABLE

ISSUE DESCRIPTION When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the MISCENABLE MSR, which is an Intel specific MSR, this MSR read is performed without error handling for a GP fault, which is t...

pv-frankonia.de Cross Site Scripting vulnerability OBB-1328810

Following coordinated and responsible vulnerability disclosure guidelines of the ISO 29147 standard, Open Bug Bounty has: &nbsp&nbsp&nbsp&nbsp&nbsp&nbspa. verified the vulnerability and confirmed its existence; &nbsp&nbsp&nbsp&nbsp&nbsp&nbspb. notified the website operator about its existence...

CVE-2020-15852

A flaw was found in the Linux kernel, in the way IOPL and IOPERM system calls were handled during context switches in x86 PV guests. This flaw allows a local guest user to escalate their privileges to the guest. The highest threat from this vulnerability is to data confidentiality and integrity a...

Xen Linux kernel privilege control vulnerability

Linux kernel is the kernel used by Linux, an open source operating system released by the Linux Foundation in the U.S. Xen is an open source virtual machine monitor product from the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same...

comune.battuda.pv.it Cross Site Scripting vulnerability

Open Bug Bounty ID: OBB-1155753 Following coordinated and responsible vulnerability disclosure guidelines of the ISO 29147 standard, Open Bug Bounty has: &nbsp&nbsp&nbsp&nbsp&nbsp&nbspa. verified the vulnerability and confirmed its existence; &nbsp&nbsp&nbsp&nbsp&nbsp&nbspb. notified the website...

Updated xen packages fix security vulnerability

- Updated from 4.12.0 to 4.12.1 - Device quarantine for alternate pci assignment methods XSA-306 - x86: Machine Check Error on Page Size Change DoS XSA-304, CVE-2018-12207 - TSX Asynchronous Abort speculative side channel XSA-305, CVE-2019-11135 - VCPUOPinitialise DoS XSA-296, CVE-2019-18420...

SUSE SLES12 Security Update : xen (SUSE-SU-2020:0334-1)

This update for xen fixes the following issues : CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host bsc1161181. CVE-2019-19579: Device quarantine for alternate pci assignment methods bsc1157888. CVE-2019-19581: findnextbit issues bsc1158003...

Updated kernel packages fix security vulnerabilities

This update is based on upstream 5.4.17 and fixes at least the following security vulnerabilities: In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running lin...

CVE-2019-3016

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD...

CVE-2019-3016

CVE-2019-3016 is a Linux kernel/KVM issue where, when PV TLB is enabled, a process inside a guest can read memory belonging to another process in the same guest. The root cause is a missing or incomplete TLB flush in the KVM x86 paravirtualized path when the host is running Linux 4.10 and the gue...

CVE-2019-3016

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD...

Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2020-5526)

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5526 advisory. - x86/KVM: Clean up host's steal time structure Boris Ostrovsky Orabug: 30489861 CVE-2019-3016 CVE-2019-3016 - x86/KVM: Make sure KVMVCPUFLUSHTLB flag ...

CVE-2019-3016

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD...

openSUSE: Security Advisory for qemu (openSUSE-SU-2019:2510-1)

The remote host is missing an update for the Copyright C 2020 Greenbone Networks GmbH 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-or-later This program is free software; you can...

Fedora 31 : xen (2019-6aad703290)

denial of service in findnextbit XSA-307, CVE-2019-19581, CVE-2019-19582 1782211 denial of service in HVM/PVH guest userspace code XSA-308, CVE-2019-19583 1782206 privilege escalation due to malicious PV guest XSA-309, CVE-2019-19578 1782210 Further issues with restartable PV type change operatio...

SUSE SLES12 Security Update : xen (SUSE-SU-2019:3297-1)

This update for xen fixes the following issues : CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm bsc1158003 XSA-307. CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to bitmaps with a compile time known size of 64 bsc1158003 XSA-307. CVE-2019-19583: Fixed improper...

CVE-2019-19578

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of an incorrect fix for CVE-2017-15595. "Linear pagetables" is a technique which involves either pointing a pagetable at itself, or to...