xen xen 4.7.0 vulnerabilities and exploits

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VMFUNC emulation in Xen 4.6.x up to and including 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging a missing NULL pointer check.

Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.6.4 Xen Xen 4.7.0 Xen Xen 4.7.1 Xen Xen 4.8.0 Citrix Xenserver 6.0.2 Citrix Xenserver 6.2.0 Citrix Xenserver 6.5 Citrix Xenserver 7.0

Xen 4.5.x up to and including 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.

Xen Xen 4.5.0 Xen Xen 4.5.1 Xen Xen 4.5.2 Xen Xen 4.5.3 Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.7.0 Citrix Xenserver 6.0 Citrix Xenserver 6.0.2 Citrix Xenserver 6.1 Citrix Xenserver 6.2.0

An issue exists in Xen 4.5.x up to and including 4.9.x allowing attackers (who control a stub domain kernel or tool stack) to cause a denial of service (host OS crash) because of a missing comparison (of range start to range end) within the DMOP map/unmap implementation.

Xen Xen 4.5.0 Xen Xen 4.5.1 Xen Xen 4.5.2 Xen Xen 4.5.3 Xen Xen 4.5.5 Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.6.4 Xen Xen 4.6.5 Xen Xen 4.6.6 Xen Xen 4.7.0

Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances...

Xen Xen 4.5.0 Xen Xen 4.5.1 Xen Xen 4.5.2 Xen Xen 4.5.3 Xen Xen 4.5.5 Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.6.4 Xen Xen 4.6.5 Xen Xen 4.6.6 Xen Xen 4.7.0

An issue exists in Xen 4.5.x up to and including 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table i...

Xen Xen 4.5.0 Xen Xen 4.5.1 Xen Xen 4.5.2 Xen Xen 4.5.3 Xen Xen 4.5.5 Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.6.4 Xen Xen 4.6.5 Xen Xen 4.6.6 Xen Xen 4.7.0

Race condition in the grant table code in Xen 4.6.x up to and including 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling.

Xen Xen 4.6.0 Xen Xen 4.6.1 Xen Xen 4.6.3 Xen Xen 4.6.4 Xen Xen 4.6.5 Xen Xen 4.6.6 Xen Xen 4.7.0 Xen Xen 4.7.1 Xen Xen 4.7.2 Xen Xen 4.7.3 Xen Xen 4.8.0 Xen Xen 4.8.1

An issue exists in Xen 4.4.x up to and including 4.9.x allowing ARM guest OS users to cause a denial of service (prevent physical CPU usage) because of lock mishandling upon detection of an add-to-physmap error.

Xen Xen 4.4.0 Xen Xen 4.4.1 Xen Xen 4.4.2 Xen Xen 4.4.3 Xen Xen 4.4.4 Xen Xen 4.5.0 Xen Xen 4.5.1 Xen Xen 4.5.2 Xen Xen 4.5.3 Xen Xen 4.5.4 Xen Xen 4.5.5 Xen Xen 4.6.0

The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and previous versions allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.

Xen Xen 3.4.0 Xen Xen 3.4.2 Xen Xen 3.4.3 Xen Xen 3.4.4 Xen Xen 4.0.0 Xen Xen 4.0.1 Xen Xen 4.0.3 Xen Xen 4.0.4 Xen Xen 4.1.0 Xen Xen 4.1.1 Xen Xen 4.1.2 Xen Xen 4.1.3

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