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| author | Ian Wilson <iwilson@brocade.com> | 2015-03-12 09:37:58 +0000 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-08-26 19:14:59 +0200 |
| commit | bd544d1cb32424912849f25c01d50ac13482d50b (patch) | |
| tree | 5d92f417c6c2c16e5689666712822cc8fa7cf3e5 /include/linux/consolemap.h | |
| parent | adb9c44f9cbc80f0baa2d9f6f57fca58440d5dbe (diff) | |
netfilter: Zero the tuple in nfnl_cthelper_parse_tuple()
commit 78146572b9cd20452da47951812f35b1ad4906be upstream.
nfnl_cthelper_parse_tuple() is called from nfnl_cthelper_new(),
nfnl_cthelper_get() and nfnl_cthelper_del(). In each case they pass
a pointer to an nf_conntrack_tuple data structure local variable:
struct nf_conntrack_tuple tuple;
...
ret = nfnl_cthelper_parse_tuple(&tuple, tb[NFCTH_TUPLE]);
The problem is that this local variable is not initialized, and
nfnl_cthelper_parse_tuple() only initializes two fields: src.l3num and
dst.protonum. This leaves all other fields with undefined values
based on whatever is on the stack:
tuple->src.l3num = ntohs(nla_get_be16(tb[NFCTH_TUPLE_L3PROTONUM]));
tuple->dst.protonum = nla_get_u8(tb[NFCTH_TUPLE_L4PROTONUM]);
The symptom observed was that when the rpc and tns helpers were added
then traffic to port 1536 was being sent to user-space.
Signed-off-by: Ian Wilson <iwilson@brocade.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
Diffstat (limited to 'include/linux/consolemap.h')
0 files changed, 0 insertions, 0 deletions