USN-3679-1 qemu update

Ken Johnson and Jann Horn independently discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via sidechannel attacks. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This update...

SUSE-SU-2018:1492-1 Security update for dpdk-thunderxdpdk

This update fixes the following issues: - CVE-2018-1059: The DPDK vhost-user interface does not check to verify that all the requested guest physical range is mapped and contiguous when performing Guest Physical Addresses to Host Virtual Addresses translations. This may lead to a malicious guest...

USN-3651-1 qemu update

Ken Johnson and Jann Horn independently discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via sidechannel attacks. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This update...

USN-3561-1 libvirt update

It was discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This...

USN-3560-1 qemu update

It was discovered that microprocessors utilizing speculative execution and branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This...

UBUNTU-CVE-2017-11334

The addressspacewritecontinue function in exec.c in QEMU aka Quick Emulator allows local guest OS privileged users to cause a denial of service out-of-bounds access and guest instance crash by leveraging use of qemumapramptr to access guest ram block area...

ALPINE-CVE-2017-10911

The makeresponse function in drivers/block/xen-blkback/blkback.c in the Linux kernel before 4.11.8 allows guest OS users to obtain sensitive information from host OS or other guest OS kernel memory by leveraging the copying of uninitialized padding fields in Xen block-interface response structure...

DEBIAN-CVE-2017-10911

The makeresponse function in drivers/block/xen-blkback/blkback.c in the Linux kernel before 4.11.8 allows guest OS users to obtain sensitive information from host OS or other guest OS kernel memory by leveraging the copying of uninitialized padding fields in Xen block-interface response structure...

OracleVM 3.4 : xen (OVMSA-2017-0094)

The remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: xen commit=8ee9cbea8e71c968e602d5b4974601d283d61d28 - BUILDINFO: QEMU upstream commit=fcd17fdf18b95a9e408acc84f6d2b37cf3fc0335 - BUILDINFO: QEMU traditional...

Xen - Broken Check in memory_exchange() Permits PV Guest Breakout Vulnerability

Exploit for multiple platform in category local exploits Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1184 This bug report describes a vulnerability in memoryexchange that permits PV guest kernels to write to an arbitrary virtual address with hypervisor privileges. The...

CVE-2017-0096

Hyper-V in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2; Windows 7 SP1; Windows 8.1, Windows Server 2012 Gold and R2; Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows guest OS users to obtain sensitive information from host OS memory via a crafted application, aka...

CVE-2016-1889

Integer overflow in the bhyve hypervisor in FreeBSD 10.1, 10.2, 10.3, and 11.0 when configured with a large amount of guest memory, allows local users to gain privilege via a crafted device descriptor...

ALPINE-CVE-2016-9932

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix...

UBUNTU-CVE-2016-9846

QEMU aka Quick Emulator built with the Virtio GPU Device emulator support is vulnerable to a memory leakage issue. It could occur while updating the cursor data in updatecursordatavirgl. A guest user/process could use this flaw to leak host memory bytes, resulting in DoS for a host...

DEBIAN-CVE-2016-9911

Quick Emulator Qemu built with the USB EHCI Emulation support is vulnerable to a memory leakage issue. It could occur while processing packet data in 'ehciinittransfer'. A guest user/process could use this issue to leak host memory, resulting in DoS for a host...

DEBIAN-CVE-2016-9103

The v9fsxattrcreate function in hw/9pfs/9p.c in QEMU aka Quick Emulator allows local guest OS administrators to obtain sensitive host heap memory information by reading xattribute values before writing to them...

FreeBSD -- bhyve(8) virtual machine escape

Problem Description: The bounds checking of accesses to guest memory greater than 4GB by device emulations is subject to integer overflow. Impact: For a bhyve virtual machine with more than 3GB of guest memory configured, a malicious guest could craft device descriptors that could give it access ...

xen-kernel -- x86: Mishandling of instruction pointer truncation during emulation

The Xen Project reports: When emulating HVM instructions, Xen uses a small i-cache for fetches from guest memory. The code that handles cache misses does not check if the address from which it fetched lies within the cache before blindly writing to it. As such it is possible for the guest to...

DEBIAN-CVE-2016-5105

The megasasdcmdcfgread function in hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, uses an uninitialized variable, which allows local guest administrators to read host memory via vectors involving a MegaRAID Firmware Interface MFI command...

Qemu: virtio: unbounded memory allocation on host via guest leading to DoS

Quick Emulator QEMU built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement results in unbounded memory allocation ...