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Vigil@nce - Linux kernel: integer overflow of Infiniband

March 2015 by Marc Jacob

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

SYNTHESIS OF THE VULNERABILITY

A local attacker can generate an integer overflow in the
Infiniband implementation of the Linux kernel, in order to trigger
a denial of service, and possibly to execute code.

Impacted products: Fedora, Linux, RHEL, Ubuntu

Severity: 2/4

Creation date: 12/03/2015

DESCRIPTION OF THE VULNERABILITY

The InfiniBand technology is used to transmit data efficiently. It
uses the Verbs API.

However, a local attacker can access to /dev/infiniband/uverbsX,
and use a large parameter, to force an integer overflow in the
ib_umem_get() function, triggering an error in the computation of
a memory address.

A local attacker can therefore generate an integer overflow in the
Infiniband implementation 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-integer-overflow-of-Infiniband-16382


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