Denial of Service Vulnerability in Xen Hypervisor on Intel CPUs

CVE-2013-1917 · LOW Severity

AV:L/AC:M/AU:N/C:N/I:N/A:P

Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction.

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