citrix xenserver 6.1 vulnerabilities and exploits

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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

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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