diff options
| author | Florian Westphal <fwestphal@astaro.com> | 2010-01-08 17:31:24 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-01-18 10:28:48 -0800 |
| commit | 6f2a4ac36508d8984c1a6a9ef5d9c1c2c61485b9 (patch) | |
| tree | f1f7a21c8548c354edc99de7a2f8ac676883cd4b | |
| parent | 87506bf2614e12d1cc4882613af0cb972aaa319a (diff) | |
netfilter: ebtables: enforce CAP_NET_ADMIN
commit dce766af541f6605fa9889892c0280bab31c66ab upstream.
normal users are currently allowed to set/modify ebtables rules.
Restrict it to processes with CAP_NET_ADMIN.
Note that this cannot be reproduced with unmodified ebtables binary
because it uses SOCK_RAW.
Signed-off-by: Florian Westphal <fwestphal@astaro.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/bridge/netfilter/ebtables.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 37928d5f2840..4877d57205de 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1405,6 +1405,9 @@ static int do_ebt_set_ctl(struct sock *sk, { int ret; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + switch(cmd) { case EBT_SO_SET_ENTRIES: ret = do_replace(sock_net(sk), user, len); @@ -1424,6 +1427,9 @@ static int do_ebt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len) struct ebt_replace tmp; struct ebt_table *t; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if (copy_from_user(&tmp, user, sizeof(tmp))) return -EFAULT; |