This is a note to let you know that I've just added the patch titled
sock_diag: Fix out-of-bounds access to sock_diag_handlers[]
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:
sock_diag-fix-out-of-bounds-access-to-sock_diag_handlers.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 <stable@xxxxxxxxxxxxxxx> know about it.
>From 83245c8498fc24b28a76c3f0de8d80f7a8986d7e Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Date: Sat, 23 Feb 2013 01:13:47 +0000
Subject: sock_diag: Fix out-of-bounds access to sock_diag_handlers[]
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
[ Upstream commit 6e601a53566d84e1ffd25e7b6fe0b6894ffd79c0 ]
Userland can send a netlink message requesting SOCK_DIAG_BY_FAMILY
with a family greater or equal then AF_MAX -- the array size of
sock_diag_handlers[]. The current code does not test for this
condition therefore is vulnerable to an out-of-bound access opening
doors for a privilege escalation.
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/sock_diag.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -121,6 +121,9 @@ static int __sock_diag_rcv_msg(struct sk
if (nlmsg_len(nlh) < sizeof(*req))
return -EINVAL;
+ if (req->sdiag_family >= AF_MAX)
+ return -EINVAL;
+
hndl = sock_diag_lock_handler(req->sdiag_family);
if (hndl == NULL)
err = -ENOENT;
Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are
queue-3.8/sock_diag-fix-out-of-bounds-access-to-sock_diag_handlers.patch
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