From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759385Ab3B1Oxk (ORCPT ); Thu, 28 Feb 2013 09:53:40 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:42563 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933156Ab3B1OvU (ORCPT ); Thu, 28 Feb 2013 09:51:20 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Mathias Krause , "David S. Miller" , Luis Henriques Subject: [PATCH 132/139] sock_diag: Fix out-of-bounds access to sock_diag_handlers[] Date: Thu, 28 Feb 2013 14:44:42 +0000 Message-Id: <1362062689-2567-133-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1362062689-2567-1-git-send-email-luis.henriques@canonical.com> References: <1362062689-2567-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.5.7.7 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathias Krause commit 6e601a53566d84e1ffd25e7b6fe0b6894ffd79c0 upstream. 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 Acked-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Luis Henriques --- net/core/sock_diag.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c index 5fd1467..964a92c 100644 --- a/net/core/sock_diag.c +++ b/net/core/sock_diag.c @@ -126,6 +126,9 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 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; -- 1.8.1.2