From: Mathias Krause <minipli@googlemail.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Mathias Krause <minipli@googlemail.com>,
James Chapman <jchapman@katalix.com>
Subject: [PATCH 09/14] l2tp: fix info leak via getsockname()
Date: Wed, 15 Aug 2012 23:31:52 +0200 [thread overview]
Message-ID: <1345066317-22512-10-git-send-email-minipli@googlemail.com> (raw)
In-Reply-To: <1345066317-22512-1-git-send-email-minipli@googlemail.com>
The L2TP code for IPv6 fails to initialize the l2tp_unused member of
struct sockaddr_l2tpip6 and that for leaks two bytes kernel stack via
the getsockname() syscall. Initialize l2tp_unused with 0 to avoid the
info leak.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: James Chapman <jchapman@katalix.com>
---
net/l2tp/l2tp_ip6.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index 35e1e4b..9275471 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -410,6 +410,7 @@ static int l2tp_ip6_getname(struct socket *sock, struct sockaddr *uaddr,
lsa->l2tp_family = AF_INET6;
lsa->l2tp_flowinfo = 0;
lsa->l2tp_scope_id = 0;
+ lsa->l2tp_unused = 0;
if (peer) {
if (!lsk->peer_conn_id)
return -ENOTCONN;
--
1.7.10.4
next prev parent reply other threads:[~2012-08-15 21:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-15 21:31 [PATCH 00/14] net: info leaks and other bugs Mathias Krause
2012-08-15 21:31 ` [PATCH 01/14] atm: fix info leak in getsockopt(SO_ATMPVC) Mathias Krause
2012-08-15 21:31 ` [PATCH 02/14] atm: fix info leak via getsockname() Mathias Krause
2012-08-15 21:31 ` [PATCH 03/14] Bluetooth: HCI - Fix info leak in getsockopt(HCI_FILTER) Mathias Krause
2012-08-15 21:31 ` [PATCH 04/14] Bluetooth: HCI - Fix info leak via getsockname() Mathias Krause
2012-08-15 21:31 ` [PATCH 05/14] Bluetooth: RFCOMM - Fix info leak in getsockopt(BT_SECURITY) Mathias Krause
2012-08-15 21:31 ` [PATCH 06/14] Bluetooth: RFCOMM - Fix info leak in ioctl(RFCOMMGETDEVLIST) Mathias Krause
2012-08-15 21:31 ` [PATCH 07/14] Bluetooth: RFCOMM - Fix info leak via getsockname() Mathias Krause
2012-08-15 21:31 ` [PATCH 08/14] Bluetooth: L2CAP " Mathias Krause
2012-08-15 21:31 ` Mathias Krause [this message]
2012-08-15 21:31 ` [PATCH 10/14] llc: fix " Mathias Krause
2012-08-15 21:31 ` [PATCH 11/14] dccp: check ccid before dereferencing Mathias Krause
2012-08-15 21:31 ` [PATCH 12/14] dccp: fix info leak via getsockopt(DCCP_SOCKOPT_CCID_TX_INFO) Mathias Krause
2012-08-15 21:31 ` [PATCH 13/14] ipvs: fix info leak in getsockopt(IP_VS_SO_GET_TIMEOUT) Mathias Krause
2012-08-15 21:31 ` [PATCH 14/14] net: fix info leak in compat dev_ifconf() Mathias Krause
2012-08-16 4:40 ` [PATCH 00/14] net: info leaks and other bugs David Miller
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