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Vigil@nce - FreeBSD: NULL pointer dereference via SCTP RE_CONFIG
February 2015 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 via a SCTP
RE_CONFIG packet sent to FreeBSD, in order to trigger a denial of
service.
Impacted products: FreeBSD
Severity: 2/4
Creation date: 28/01/2015
DESCRIPTION OF THE VULNERABILITY
The SCTP protocol is used to transport several message streams,
multiplexed over one connection.
However, if a SCTP RE_CONFIG message has an incoherent size,
FreeBSD does not check if a pointer is NULL, before using it.
An attacker can therefore force a NULL pointer to be dereferenced
via a SCTP RE_CONFIG packet sent to FreeBSD, in order to trigger a
denial of service.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/FreeBSD-NULL-pointer-dereference-via-SCTP-RE-CONFIG-16067
