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Vigil@nce - Linux kernel: buffer overflow of vhost-net handle_rx

April 2014 by Marc Jacob

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker, privileged in a guest system, can generate a buffer
overflow in the handle_rx() function of the Linux kernel, in order
to trigger a denial of service, and possibly to execute code.

Impacted products: Fedora, Linux

Severity: 2/4

Creation date: 09/04/2014

DESCRIPTION OF THE VULNERABILITY

The vhost-net driver implements network features in a virtualized
environment.

However, if the size of data is greater than the size of the
storage array, an overflow occurs in the get_rx_bufs() function of
the drivers/vhost/net.c file.

An attacker, privileged in a guest system, can therefore generate
a buffer overflow in the handle_rx() function of the Linux kernel,
in order to trigger a denial of service, and possibly to execute
code.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-buffer-overflow-of-vhost-net-handle-rx-14559


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