Red Hat Security Advisory 2012-1236-01

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  1. #1 newsbot, 06.09.2012
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    Red Hat Security Advisory 2012-1236-01 - The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux. A flaw was found in the way QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu process on the host or, possibly, escalate their privileges on the host. This flaw did not affect the default use of the Xen hypervisor implementation in Red Hat Enterprise Linux 5. This problem only affected fully-virtualized guests that have a serial or parallel device that uses a virtual console back-end. By default, the virtual console back-end is not used for such devices; only guests explicitly configured to use them in this way were affected.

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Red Hat Security Advisory 2012-1236-01

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