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SYNTHESIS OF THE VULNERABILITY

A local attacker on ARM can execute a program with several
threads, in order to trigger a denial of service of the Linux
kernel.

– Impacted products: Linux
– Severity: 1/4
– Creation date: 30/12/2013

DESCRIPTION OF THE VULNERABILITY

On an ARM processor, the arch/arm/kernel/process.c file manages
the execution of processes.

The get_wchan() function of process.c manages the stack. However,
it does not check if the stack pointer is valid before
dereferencing it.

A local attacker on ARM can therefore execute a program with
several threads, in order to trigger a denial of service of the
Linux kernel.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-get-wchan-14001