diff options
| author | Patrick McHardy <kaber@trash.net> | 2006-06-30 05:33:12 +0200 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2006-06-30 10:37:31 -0700 |
| commit | 9c48e1ea8cf8800cc5e2d39ccbb8b5ff9704f8e9 (patch) | |
| tree | aeb13575ceee98bb0dcf5f0ee521a7eebe6b32ae | |
| parent | 27162bf76c8e1d20f81ba53c356ca8681aa90461 (diff) | |
[PATCH] NETFILTER: SCTP conntrack: fix crash triggered by packet without chunks [CVE-2006-2934]
When a packet without any chunks is received, the newconntrack variable
in sctp_packet contains an out of bounds value that is used to look up an
pointer from the array of timeouts, which is then dereferenced, resulting
in a crash. Make sure at least a single chunk is present.
Problem noticed by George A. Theall <theall@tenablesecurity.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_proto_sctp.c | 2 | ||||
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_sctp.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c index 0416073c560..2d3612cd5f1 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c @@ -254,7 +254,7 @@ static int do_basic_checks(struct ip_conntrack *conntrack, } DEBUGP("Basic checks passed\n"); - return 0; + return count == 0; } static int new_state(enum ip_conntrack_dir dir, diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c index 0c6da496cfa..9dab81d3182 100644 --- a/net/netfilter/nf_conntrack_proto_sctp.c +++ b/net/netfilter/nf_conntrack_proto_sctp.c @@ -259,7 +259,7 @@ static int do_basic_checks(struct nf_conn *conntrack, } DEBUGP("Basic checks passed\n"); - return 0; + return count == 0; } static int new_state(enum ip_conntrack_dir dir, |