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Vigil@nce - OpenBSD: information disclosure via exec_elf.c

May 2015 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

A local attacker can read a memory fragment with exec_elf.c of
OpenBSD, in order to obtain sensitive information, or to stop the
kernel.

Impacted products: OpenBSD

Severity: 1/4

Creation date: 04/05/2015

DESCRIPTION OF THE VULNERABILITY

The OpenBSD kernel executes programs in ELF format.

However, the load_file() function of the sys/kern/exec_elf.c file
loads a memory area too large before returning it to the user.

A local attacker can therefore read a memory fragment with
exec_elf.c of OpenBSD, in order to obtain sensitive information,
or to stop the kernel.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/OpenBSD-information-disclosure-via-exec-elf-c-16797


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