USN-3698-1 linux vulnerabilities

It was discovered that the nested KVM implementation in the Linux kernel in some situations did not properly prevent second level guests from reading and writing the hardware CR8 register. A local attacker in a guest could use this to cause a denial of service system crash. CVE-2017-12154 Fan Wu,...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

DEBIAN-CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

Code injection

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

CVE-2018-12904

CVE-2018-12904 affects the Linux kernel’s KVM implementation on x86 when nested virtualization is enabled. The vulnerability arises in arch/x86/kvm/vmx.c due to insufficient CPL checks, potentially allowing a local attacker running in a guest VM (L1) to cause VMEXITs that may lead to privilege es...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

UBUNTU-CVE-2018-12904

In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL...

KVM (Nested Virtualization) - L1 Guest Privilege Escalation Vulnerability

Exploit for linux platform in category dos / poc When KVM on Intel virtualizes another hypervisor as L1 VM it does not verify that VMX instructions from the L1 VM which trigger a VM exit and are emulated by L0 KVM are coming from ring 0. For code running on bare metal or VMX root mode this is...

KVM (Nested Virtualization) - L1 Guest Privilege Escalation

KVM Nested Virtualization - L1 Guest Privilege Escalation When KVM on Intel virtualizes another hypervisor as L1 VM it does not verify that VMX instructions from the L1 VM which trigger a VM exit and are emulated by L0 KVM are coming from ring 0. For code running on bare metal or VMX root mode th...

KVM (Nested Virtualization) - L1 Guest Privilege Escalation

When KVM on Intel virtualizes another hypervisor as L1 VM it does not verify that VMX instructions from the L1 VM which trigger a VM exit and are emulated by L0 KVM are coming from ring 0. For code running on bare metal or VMX root mode this is enforced by hardware. However, for code running in L...

Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register

Linux kernel built with the KVM visualization support CONFIGKVM, with nested visualization nVMX feature enabled nested=1, is vulnerable to a crash due to disabled external interrupts. As L2 guest could access r/w hardware CR8 register of the hostL0. In a nested visualization setup, L2 guest user...

Kernel: kvm: nVMX: L2 guest could access hardware(L0) CR8 register

Linux kernel built with the KVM visualization support CONFIGKVM, with nested visualization nVMX feature enabled nested=1, is vulnerable to a crash due to disabled external interrupts. As L2 guest could access r/w hardware CR8 register of the hostL0. In a nested visualization setup, L2 guest user...

Product update: Virtuozzo 7.0 Update 7 (7.0.7-423)

The Update 7 for Virtuozzo 7.0 provides new features as well as stability and usability bug fixes. Vulnerability id: PSBM-79872 Enabling nested virtualization for VM could fail due to a bug in libvirt. Vulnerability id: PSBM-81107 Setting IP address to a VM without guest tools returned error even...

kernel update provides 4.14 series and fixes security vulnerabilities

This kernel update provides an upgrade to the 4.14 longterm branch, currently based on 4.14.10. It also fixes at least the following security issues: An elevation of privilege vulnerability in the Broadcom wi-fi driver CVE-2017-0786. Use-after-free vulnerability in the sndpcminfo function in the...

USN-3469-2 linux-lts-xenial vulnerabilities

USN-3469-1 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 LTS. Anthony Perard discovered that the Xen virtual block driver did not properly initializ...

DEBIAN-CVE-2017-12188

arch/x86/kvm/mmu.c in the Linux kernel through 4.13.5, when nested virtualisation is used, does not properly traverse guest pagetable entries to resolve a guest virtual address, which allows L1 guest OS users to execute arbitrary code on the host OS or cause a denial of service incorrect index...