NETFILTER: {ip, nf}_conntrack_sctp: fix remotely triggerable NULL ptr dereference...
authorPatrick McHardy <kaber@trash.net>
Tue, 5 Jun 2007 12:14:22 +0000 (14:14 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 10 Jul 2007 18:08:22 +0000 (11:08 -0700)
commit8b1d585987bbac55cde85650b47b8eaebce54e13
tree83460691442029e951fef7553293a8775541ce1c
parent7dcca30a32aadb0520417521b0c44f42d09fe05c
NETFILTER: {ip, nf}_conntrack_sctp: fix remotely triggerable NULL ptr dereference (CVE-2007-2876)

When creating a new connection by sending an unknown chunk type, we
don't transition to a valid state, causing a NULL pointer dereference in
sctp_packet when accessing sctp_timeouts[SCTP_CONNTRACK_NONE].

Fix by don't creating new conntrack entry if initial state is invalid.

Noticed by Vilmos Nebehaj <vilmos.nebehaj@ramsys.hu>

CC: Kiran Kumar Immidi <immidi_kiran@yahoo.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
net/netfilter/nf_conntrack_proto_sctp.c