Input validation

Multiple HVM control operations in Xen 3.4 through 4.2 allow local HVM guest OS administrators to cause a denial of service physical CPU consumption via a large input...

CVE-2012-5511

Stack-based buffer overflow in the dirty video RAM tracking functionality in Xen 3.4 through 4.1 allows local HVM guest OS administrators to cause a denial of service crash via a large bitmap image...

CVE-2012-5512

Array index error in the HVMOPsetmemaccess handler in Xen 4.1 allows local HVM guest OS administrators to cause a denial of service crash or obtain sensitive information via unspecified vectors...

Command injection

The guestphysmapmarkpopulateondemand function in Xen 4.2 and earlier does not properly unlock the subject GFNs when checking if they are in use, which allows local guest HVM administrators to cause a denial of service hang via unspecified vectors...

CVE-2012-6333

Multiple HVM control operations in Xen 3.4 through 4.2 allow local HVM guest OS administrators to cause a denial of service physical CPU consumption via a large input...

CVE-2012-6333

Multiple HVM control operations in Xen 3.4 through 4.2 allow local HVM guest OS administrators to cause a denial of service physical CPU consumption via a large input...

CVE-2012-5511

Stack-based buffer overflow in the dirty video RAM tracking functionality in Xen 3.4 through 4.1 allows local HVM guest OS administrators to cause a denial of service crash via a large bitmap image...

CVE-2012-5512

Array index error in the HVMOPsetmemaccess handler in Xen 4.1 allows local HVM guest OS administrators to cause a denial of service crash or obtain sensitive information via unspecified vectors...

CVE-2012-6333

CVE-2012-6333 affects Xen hypervisor versions 3.4–4.2, where multiple HVM control operations can be abused by local HVM guest admins to cause a denial of service through high physical CPU consumption by supplying a large input. The initial description specifies local access with no authentication...

kernel: xen: Memory mapping failure can crash Xen

Xen 3.4 through 4.2, and possibly earlier versions, does not properly synchronize the p2m and m2p tables when the setp2mentry function fails, which allows local HVM guest OS administrators to cause a denial of service memory consumption and assertion failure, aka "Memory mapping failure DoS...

DEBIAN-CVE-2012-3432

The handlemmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service guest OS crash via unspecified...

CVE-2012-3432

The handlemmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service guest OS crash via unspecified...

CVE-2012-3432

The handlemmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service guest OS crash via unspecified...

Design/Logic Flaw

The handlemmio function in arch/x86/hvm/io.c in the MMIO operations emulator for Xen 3.3 and 4.x, when running an HVM guest, does not properly reset certain state information between emulation cycles, which allows local guest OS users to cause a denial of service guest OS crash via unspecified...

Broken error handling in guest_physmap_mark_populate_on_demand()

ISSUE DESCRIPTION guestphysmapmarkpopulateondemand, before carrying out its actual operation, checks that the subject GFNs are not in use. If that check fails, the code prints a message and bypasses the gfnunlock matching the gfnlock carried out before entering the loop. Further, the function is...

several HVM operations do not validate the range of their inputs

ISSUE DESCRIPTION Several HVM control operations do not check the size of their inputs and can tie up a physical CPU for extended periods of time. In addition dirty video RAM tracking involves clearing the bitmap provided by the domain controlling the guest e.g. dom0 or a stubdom. If the size of...

HVMOP_get_mem_access crash / HVMOP_set_mem_access information leak

ISSUE DESCRIPTION The HVMOPsetmemaccess operation handler uses an input as an array index before range checking it. IMPACT A malicious guest administrator can cause Xen to crash. If the out of array bounds access does not crash, the arbitrary value read will be used if the caller reads back the...

CVE-2012-4538

The HVMOPpagetabledying hypercall in Xen 4.0, 4.1, and 4.2 does not properly check the pagetable state when running on shadow pagetables, which allows a local HVM guest OS to cause a denial of service hypervisor crash via unspecified vectors...

CVE-2012-3433

Xen 4.0 and 4.1 allows local HVM guest OS kernels to cause a denial of service domain 0 VCPU hang and kernel panic by modifying the physical address space in a way that triggers excessive shared page search time during the p2m teardown...

CVE-2012-4538

The HVMOPpagetabledying hypercall in Xen 4.0, 4.1, and 4.2 does not properly check the pagetable state when running on shadow pagetables, which allows a local HVM guest OS to cause a denial of service hypervisor crash via unspecified vectors...