diff options
Diffstat (limited to 'tags/2.6.18-10/30021_nf_conntrack_sctp-null-deref.patch')
| -rw-r--r-- | tags/2.6.18-10/30021_nf_conntrack_sctp-null-deref.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tags/2.6.18-10/30021_nf_conntrack_sctp-null-deref.patch b/tags/2.6.18-10/30021_nf_conntrack_sctp-null-deref.patch new file mode 100644 index 0000000..17117b6 --- /dev/null +++ b/tags/2.6.18-10/30021_nf_conntrack_sctp-null-deref.patch @@ -0,0 +1,49 @@ +From: Patrick McHardy <kaber@trash.net> +Date: Tue, 5 Jun 2007 12:14:22 +0000 (+0200) +Subject: [UBUNTU] CVE-2007-2876 NETFILTER: {ip, nf}_conntrack_sctp: fix remotely triggerable ... +X-Git-Url: http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-edgy.git;a=commitdiff;h=3ccb814b91bca2e0a6fe4b5d1c5dbb35a06a848b + +[UBUNTU] CVE-2007-2876 NETFILTER: {ip, nf}_conntrack_sctp: fix remotely triggerable NULL ptr dereference + +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> + +modified: net/ipv4/netfilter/ip_conntrack_proto_sctp.c +modified: net/netfilter/nf_conntrack_proto_sctp.c +--- + +--- a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c ++++ b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c +@@ -461,7 +461,8 @@ static int sctp_new(struct ip_conntrack + SCTP_CONNTRACK_NONE, sch->type); + + /* Invalid: delete conntrack */ +- if (newconntrack == SCTP_CONNTRACK_MAX) { ++ if (newconntrack == SCTP_CONNTRACK_NONE || ++ newconntrack == SCTP_CONNTRACK_MAX) { + DEBUGP("ip_conntrack_sctp: invalid new deleting.\n"); + return 0; + } +--- a/net/netfilter/nf_conntrack_proto_sctp.c ++++ b/net/netfilter/nf_conntrack_proto_sctp.c +@@ -467,7 +467,8 @@ static int sctp_new(struct nf_conn *conn + SCTP_CONNTRACK_NONE, sch->type); + + /* Invalid: delete conntrack */ +- if (newconntrack == SCTP_CONNTRACK_MAX) { ++ if (newconntrack == SCTP_CONNTRACK_NONE || ++ newconntrack == SCTP_CONNTRACK_MAX) { + DEBUGP("nf_conntrack_sctp: invalid new deleting.\n"); + return 0; + } |