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| author | Patrick McHardy <kaber@trash.net> | 2006-06-30 06:40:23 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-30 23:12:01 +0200 |
| commit | dd7271feba61d5dc0fab1cb5365db9926d35ea3a (patch) | |
| tree | 36adf4a907e72b07eb4b37bbd679357fe4c0729f | |
| parent | [TG3]: Update version and reldate (diff) | |
| download | linux-dd7271feba61d5dc0fab1cb5365db9926d35ea3a.tar.xz linux-dd7271feba61d5dc0fab1cb5365db9926d35ea3a.zip | |
[NETFILTER]: SCTP conntrack: fix crash triggered by packet without chunks
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: David S. Miller <davem@davemloft.net>
| -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 0416073c5600..2d3612cd5f18 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 0839b701b930..9bd8a7877fd5 100644 --- a/net/netfilter/nf_conntrack_proto_sctp.c +++ b/net/netfilter/nf_conntrack_proto_sctp.c @@ -261,7 +261,7 @@ 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, |