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vulnerability bulletin CVE-2013-0152

Xen: memory leak via Nested Virtualization

Synthesis of the vulnerability

An attacker, who is an administrator in a guest system, can use the Nested Virtualization feature, in order to stop the Xen host system.
Impacted products: Fedora, Unix (platform).
Severity: 1/4.
Creation date: 22/01/2013.
Identifiers: BID-57494, CERTA-2013-AVI-060, CVE-2013-0152, FEDORA-2013-1434, VIGILANCE-VUL-12348, XSA-35.

Description of the vulnerability

The Nested Virtualization feature is used to start a virtual machine inside another virtual machine.

However, when a guest system enables the Nested Virtualization, a memory area is allocated, but it is never freed.

An attacker, who is an administrator in a guest system, can therefore use the Nested Virtualization feature, in order to stop the Xen host system.
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