UBUNTU-CVE-2019-18423

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEMaddtophysmap hypercall. p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two...

Design/Logic Flaw

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEMaddtophysmap hypercall. p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two...

add-to-physmap can be abused to DoS Arm hosts

ISSUE DESCRIPTION p2m-maxmappedgfn is used by the functions p2mresolvetranslationfault and p2mgetentry to sanity check guest physical frame. The rest of the code in the two functions will assume that there is a valid root table and check that with BUGON. The function p2mgetrootpointer will ignore...

Citrix Hypervisor Security Update

Description of Problem A number of vulnerabilities have been found in Citrix Hypervisor formerly Citrix XenServer that allow the host to be compromised by: i. Privileged code in a guest VM that has been assigned a PCI passthrough device ii. Privileged code in a PV guest VM iii. Unprivileged code ...

Xen CVE-2019-18421 Privilege Escalation Vulnerability

Description Xen is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges, obtain sensitive information or cause denial-of-service conditions. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2 Citr...

Xen CVE-2019-18425 Privilege Escalation Vulnerability

Description Xen is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges, obtain sensitive information or cause denial-of-service conditions. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2 Citr...

Xen CVE-2019-18423 Denial of Service Vulnerability

Description Xen is prone to a denial-of-service vulnerability. An attacker can exploit this issue to crash hypervisor, denying service to legitimate users. Xen version 4.8 and later are vulnerable. Technologies Affected Xen Xen 4.10 Xen Xen 4.10.0 Xen Xen 4.10.1 Xen Xen 4.10.2 Xen Xen 4.11.0 Xen...

PT-2019-4885 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions prior to 4.13 Description: An issue in Xen allows ARM guest OS users to cause a denial of service via a XENMEM add to physmap hypercall. The functions p2m resolve translation fault and p2m get entry use p2m-max mapped gfn to sani...

PT-2019-4839 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions 3.2 through 4.12.x Description: The issue is related to an error in the x86 PV emulation of the Xen hypervisor, specifically a missing check for the descriptor table limit. This could allow a remote attacker to access confidentia...

Xen CVE-2019-18424 Privilege Escalation Vulnerability

Description Xen is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges on the affected system. Technologies Affected Citrix Hypervisor 8.0 Citrix XenServer 7.0 Citrix XenServer 7.1 LTSR CU2 Citrix XenServer 7.6 Xen Xen 3.2.0 Xen Xen 3.2.1...

VMware ESXi, VMware Workstation and VMware Fusion Denial of Service Vulnerabilities

VMware ESXi is a server virtualization platform that can be installed directly on physical servers, VMware Workstation is a set of virtual machine software, and VMware Fusion is a set of virtual machine software designed to run Windows applications on Macs. VMware Fusion is a suite of virtual...

USN-4162-2: Linux kernel (Azure) vulnerabilities

USN-4162-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux kernel for Microsoft Azure Cloud systems for Ubuntu 14.04 ESM. It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not did not handle detach...

USN-4163-2: Linux kernel (Xenial HWE) vulnerabilities

USN-4163-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement HWE kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 ESM. It was discovered that a race condition existed in the ARC EMAC ethernet driver for th...

Oracle VirtualBox shader_record_register_usage Out-Of-Bounds Write Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the...

Oracle VirtualBox VMSVGA Out-Of-Bounds Read Information Disclosure Vulnerability

This vulnerability allows local attackers to disclose sensitive information on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within...

Oracle VirtualBox VMSVGA Out-Of-Bounds Read Information Disclosure Vulnerability

This vulnerability allows local attackers to disclose sensitive information on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within t...

X11 Mesa 3D Graphics Library shared memory permissions vulnerability

Summary An exploitable shared memory permissions vulnerability exists in the functionality of X11 Mesa 3D Graphics Library. An attacker can access the shared memory without any specific permissions to trigger this vulnerability. Tested Versions Mesa 3D X11 Graphics library 19.1.2 Product URLs...

Ubuntu: Security Advisory (USN-4163-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2019 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...

Ubuntu: Security Advisory (USN-4162-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2019 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...

CVE-2018-10853

A flaw was found in the way Linux kernel KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilegeCPL level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside...