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 ...

DEBIAN-CVE-2016-2150

SPICE allows local guest OS users to read from or write to arbitrary host memory locations via crafted primary surface parameters, a similar issue to CVE-2015-5261...

DEBIAN-CVE-2015-5261

Heap-based buffer overflow in SPICE before 0.12.6 allows guest OS users to read and write to arbitrary memory locations on the host via guest QXL commands related to surface creation...

spice: Host memory access from guest with invalid primary surface parameters

A memory access flaw was found in the way spice handled certain guests using crafted primary surface parameters. A user in a guest could use this flaw to read from and write to arbitrary memory locations on the host...

spice: Host memory access from guest with invalid primary surface parameters

A memory access flaw was found in the way spice handled certain guests using crafted primary surface parameters. A user in a guest could use this flaw to read from and write to arbitrary memory locations on the host...

UBUNTU-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...

xen-kernel -- x86 software guest page walk PS bit handling flaw

The Xen Project reports: The Page Size PS page table entry bit exists at all page table levels other than L1. Its meaning is reserved in L4, and conditionally reserved in L3 and L2 depending on hardware capabilities. The software page table walker in the hypervisor, however, so far ignored that b...

USN-2974-1 qemu, qemu-kvm vulnerabilities

Zuozhi Fzz discovered that QEMU incorrectly handled USB OHCI emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. CVE-2016-2391 Qinghao Tang discovered that QEMU incorrectly handled USB Net emulation support. A...

SUSE-SU-2016:1259-1 Security update for spice

Spice was updated to fix three security issues. The following vulnerabilities were fixed: CVE-2015-3247: heap corruption in the spice server bsc944460 CVE-2015-5261: Guest could have accessed host memory using crafted images bsc948976 CVE-2015-5260: Insufficient validation of surfaceid parameter...

DEBIAN-CVE-2015-8553

Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777...

CVE-2016-0090

Hyper-V in Microsoft Windows 8.1, Windows Server 2012 R2, and Windows 10 allows guest OS users to obtain sensitive information from host OS memory via a crafted application, aka "Hyper-V Information Disclosure Vulnerability."...

CVE-2016-0089

Hyper-V in Microsoft Windows 8.1, Windows Server 2012 Gold and R2, and Windows 10 allows guest OS users to obtain sensitive information from host OS memory via a crafted application, aka "Hyper-V Information Disclosure Vulnerability."...

spice: host memory access from guest using crafted images

A heap-based buffer overflow flaw was found in the way SPICE handled certain guest QXL commands related to surface creation. A user in a guest could use this flaw to read and write arbitrary memory locations on the host...

spice: host memory access from guest using crafted images

A heap-based buffer overflow flaw was found in the way SPICE handled certain guest QXL commands related to surface creation. A user in a guest could use this flaw to read and write arbitrary memory locations on the host...

xen-kernel -- Information leak through XEN_DOMCTL_gettscinfo

The Xen Project reports: The handler for XENDOMCTLgettscinfo failed to initialize a padding field subsequently copied to guest memory. A similar leak existed in XENSYSCTLgetdomaininfolist, which is being addressed here regardless of that operation being declared unsafe for disaggregation by XSA-7...

insufficient permissions checks accessing guest memory on ARM

ISSUE DESCRIPTION When accessing guest memory Xen does not correctly perform permissions checks on the possibly guest provided virtual address: it only checks that the mapping is readable by the guest, even when writing on behalf of the guest. This allows a guest to write to memory which it shoul...

UBUNTU-CVE-2013-1943

The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation of memory slots for use in a guest's physical address space, which allows local users to gain privileges or obtain sensitive information from kernel memory via a crafted...

kernel: kvm: after free issue with the handling of MSR_KVM_SYSTEM_TIME

Use-after-free vulnerability in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 allows guest OS users to cause a denial of service host OS memory corruption or possibly have unspecified other impact via a crafted application that triggers use of a guest physical address GPA in 1 movable or 2...

kernel: kvm: out-of-bounds access in ioapic indirect register reads

The ioapicreadindirect function in virt/kvm/ioapic.c in the Linux kernel through 3.8.4 does not properly handle a certain combination of invalid IOAPICREGSELECT and IOAPICREGWINDOW operations, which allows guest OS users to obtain sensitive information from host OS memory or cause a denial of...

kernel: kvm: after free issue with the handling of MSR_KVM_SYSTEM_TIME

Use-after-free vulnerability in arch/x86/kvm/x86.c in the Linux kernel through 3.8.4 allows guest OS users to cause a denial of service host OS memory corruption or possibly have unspecified other impact via a crafted application that triggers use of a guest physical address GPA in 1 movable or 2...