Actu
Vigil@nce - FreeBSD: buffer overflow of stdio
December 2014 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can generate a buffer overflow in stdio of FreeBSD, in
order to trigger a denial of service, and possibly to execute code.
Impacted products: FreeBSD
Severity: 2/4
Creation date: 11/12/2014
DESCRIPTION OF THE VULNERABILITY
Data to be written on stdio are buffered, and unstacked by the
fflush() function.
However, the __sflush() function does not correctly manage the
shift operation, so an overflow occurs.
An attacker can therefore generate a buffer overflow in stdio of
FreeBSD, in order to trigger a denial of service, and possibly to
execute code.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/FreeBSD-buffer-overflow-of-stdio-15783
