This is a note to let you know that I've just added the patch titled
l2tp: fix info leak in l2tp_ip6_recvmsg()
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
l2tp-fix-info-leak-in-l2tp_ip6_recvmsg.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6671ade6feb2e93861cb30cce6933b6ce7684791 Mon Sep 17 00:00:00 2001
From: Mathias Krause <[email protected]>
Date: Sun, 7 Apr 2013 01:51:55 +0000
Subject: l2tp: fix info leak in l2tp_ip6_recvmsg()
From: Mathias Krause <[email protected]>
[ Upstream commit b860d3cc62877fad02863e2a08efff69a19382d2 ]
The L2TP code for IPv6 fails to initialize the l2tp_conn_id member of
struct sockaddr_l2tpip6 and therefore leaks four bytes kernel stack
in l2tp_ip6_recvmsg() in case msg_name is set.
Initialize l2tp_conn_id with 0 to avoid the info leak.
Signed-off-by: Mathias Krause <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/l2tp/l2tp_ip6.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -684,6 +684,7 @@ static int l2tp_ip6_recvmsg(struct kiocb
lsa->l2tp_addr = ipv6_hdr(skb)->saddr;
lsa->l2tp_flowinfo = 0;
lsa->l2tp_scope_id = 0;
+ lsa->l2tp_conn_id = 0;
if (ipv6_addr_type(&lsa->l2tp_addr) & IPV6_ADDR_LINKLOCAL)
lsa->l2tp_scope_id = IP6CB(skb)->iif;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.8/irda-fix-missing-msg_namelen-update-in-irda_recvmsg_dgram.patch
queue-3.8/bluetooth-rfcomm-fix-missing-msg_namelen-update-in-rfcomm_sock_recvmsg.patch
queue-3.8/llc-fix-missing-msg_namelen-update-in-llc_ui_recvmsg.patch
queue-3.8/nfc-llcp-fix-info-leaks-via-msg_name-in-llcp_sock_recvmsg.patch
queue-3.8/atm-update-msg_namelen-in-vcc_recvmsg.patch
queue-3.8/iucv-fix-missing-msg_namelen-update-in-iucv_sock_recvmsg.patch
queue-3.8/ax25-fix-info-leak-via-msg_name-in-ax25_recvmsg.patch
queue-3.8/tipc-fix-info-leaks-via-msg_name-in-recv_msg-recv_stream.patch
queue-3.8/netrom-fix-info-leak-via-msg_name-in-nr_recvmsg.patch
queue-3.8/caif-fix-missing-msg_namelen-update-in-caif_seqpkt_recvmsg.patch
queue-3.8/l2tp-fix-info-leak-in-l2tp_ip6_recvmsg.patch
queue-3.8/bluetooth-sco-fix-missing-msg_namelen-update-in-sco_sock_recvmsg.patch
queue-3.8/bluetooth-fix-possible-info-leak-in-bt_sock_recvmsg.patch
queue-3.8/rose-fix-info-leak-via-msg_name-in-rose_recvmsg.patch
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