USN-3698-1: Linux kernel 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,...

RHEL 7 : qemu-kvm-rhev (RHSA-2018:2060)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:2060 advisory. KVM Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the...

Linux kernel elevation of privilege and denial of service vulnerability

Linux kernel is the kernel used by Linux, the open source operating system released by the Linux Foundation in the United States. A security vulnerability exists in the arch/x86/kvm/vmx.c file in versions of Linux kernel prior to 4.17.2, which stems from the program's lack of CPL detection. A loc...

Oracle Linux 7 : qemu-kvm (ELSA-2018-2001)

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2018-2001 advisory. 1.5.3-156.el75.3 - kvm-i386-Define-the-Virt-SSBD-MSR-and-handling-of-it-CVE.patch bz1584363 - kvm-i386-define-the-AMD-virt-ssbd-CPUID-feature-bit-CVE-.patch...

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...

Important: Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

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...

RHEL 7 : qemu-kvm (RHSA-2018:2001)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2018:2001 advisory. Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the...

qemu-kvm security update

1.5.3-156.el75.3 - kvm-i386-Define-the-Virt-SSBD-MSR-and-handling-of-it-CVE.patch bz1584363 - kvm-i386-define-the-AMD-virt-ssbd-CPUID-feature-bit-CVE-.patch bz1584363 - Resolves: bz1584363 CVE-2018-3639 qemu-kvm: hw: cpu: AMD: speculative store bypass rhel-7.5.z...

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...

Scientific Linux Security Update : qemu-kvm on SL7.x x86_64 (20180626) (Spectre)

Security Fixes : - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions a commonly used performance optimization. It relies on the presence of a precisely-defined instruction sequence in the privileged...

Important: Red Hat Security Advisory: qemu-kvm security update

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

SUSE-SU-2018:1816-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 12 SP3 RT kernel was updated to 4.4.138 to receive various security and bugfixes. The following security bugs were fixed: - CVE-2018-12233: A memory corruption bug in JFS could have been triggered by calling setxattr twice with two different extended attribute names on t...

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 Nest Virtualization L1 Guest Privilege Escalation

KVM nested virtualization: privilege escalation in L1 guest 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...

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...

openSUSE Security Update : the Linux Kernel (openSUSE-2018-656) (Spectre)

The openSUSE Leap 42.3 was updated to 4.4.138 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2018-3639: Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes...

SUSE SLES11 Security Update : cobbler (SUSE-SU-2018:1741-1)

This update for cobbler fixes the following issues : - CVE-2017-1000469: Escape shell parameters provided by the user for the reposync action. bsc1074594 - Fix for calling koan with virttype kvm. bsc1090205 Note that Tenable Network Security has extracted the preceding description block directly...