First published: Mon May 13 2013(Updated: )
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.
Credit: secalert@redhat.com
Affected Software | Affected Version | How to fix |
---|---|---|
Xen Xen | =3.1.3 | |
Xen Xen | =3.1.4 | |
Xen Xen | =3.2.0 | |
Xen Xen | =3.2.1 | |
Xen Xen | =3.2.2 | |
Xen Xen | =3.2.3 | |
Xen Xen | =3.3.0 | |
Xen Xen | =3.3.1 | |
Xen Xen | =3.3.2 | |
Xen Xen | =3.4.0 | |
Xen Xen | =3.4.1 | |
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 | =4.0.2 | |
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 | |
Xen Xen | =4.1.4 | |
Xen Xen | =4.2.0 | |
Xen Xen | =4.2.1 | |
Xen Xen | =4.2.2 |
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