mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
28 lines
997 B
Diff
28 lines
997 B
Diff
|
From 6e601a53566d84e1ffd25e7b6fe0b6894ffd79c0 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Mathias Krause <minipli@googlemail.com>
|
||
|
|
Date: Sat, 23 Feb 2013 01:13:47 +0000
|
||
|
|
Subject: sock_diag: Fix out-of-bounds access to sock_diag_handlers[]
|
||
|
|
|
||
|
|
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@googlemail.com>
|
||
|
|
Acked-by: Eric Dumazet <edumazet@google.com>
|
||
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|
|
---
|
||
|
|
--- 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;
|