-stable review patch. If anyone has any objections, please let us know. ------------------ From: Patrick McHardy The 32bit compatibility layer has no CAP_NET_ADMIN check in compat_do_ipt_get_ctl, which for example allows to list the current iptables rules even without having that capability (the non-compat version requires it). Other capabilities might be required to exploit the bug (eg. CAP_NET_RAW to get the nfnetlink socket?), so a plain user can't exploit it, but a setup actually using the posix capability system might very well hit such a constellation of granted capabilities. Signed-off-by: Björn Steinbrink Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller Signed-off-by: Chris Wright --- commit 4410392a8258fd972fc08a336278b14c82b2774f tree 567261d003b2a8fb08c2d89d0d708dd06f357f49 parent b4d854665eafe32b48e0eecadb91a73f6eea0055 author Patrick McHardy Fri, 17 Nov 2006 06:22:07 +0100 committer Patrick McHardy Fri, 17 Nov 2006 06:22:07 +0100 net/ipv4/netfilter/ip_tables.c | 3 +++ 1 file changed, 3 insertions(+) --- linux-2.6.18.4.orig/net/ipv4/netfilter/ip_tables.c +++ linux-2.6.18.4/net/ipv4/netfilter/ip_tables.c @@ -1994,6 +1994,9 @@ compat_do_ipt_get_ctl(struct sock *sk, i { int ret; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + switch (cmd) { case IPT_SO_GET_INFO: ret = get_info(user, len, 1); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/