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Vigil@nce - Linux kernel: NULL pointer dereference via assoc_array

September 2014 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An attacker can force a NULL pointer to be dereferenced in the
assoc_array feature of the Linux kernel, in order to trigger a
denial of service.

Impacted products: Fedora, Linux

Severity: 1/4

Creation date: 18/09/2014

DESCRIPTION OF THE VULNERABILITY

The Linux kernel implements associative arrays in the
lib/assoc_array.c file. These arrays are for example used for key
management.

However, the assoc_array_gc() function does not check if a pointer
is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced
in the assoc_array feature of the Linux kernel, in order to
trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-NULL-pointer-dereference-via-assoc-array-15373


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