From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:52344 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753411AbdIDKpv (ORCPT ); Mon, 4 Sep 2017 06:45:51 -0400 Subject: Patch "xfrm: policy: check policy direction value" has been added to the 3.18-stable tree To: vdronov@redhat.com, gregkh@linuxfoundation.org, steffen.klassert@secunet.com, zhangbo5891001@gmail.com Cc: , From: Date: Mon, 04 Sep 2017 12:45:46 +0200 Message-ID: <150452194611666@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled xfrm: policy: check policy direction value to the 3.18-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: xfrm-policy-check-policy-direction-value.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7bab09631c2a303f87a7eb7e3d69e888673b9b7e Mon Sep 17 00:00:00 2001 From: Vladis Dronov Date: Wed, 2 Aug 2017 19:50:14 +0200 Subject: xfrm: policy: check policy direction value From: Vladis Dronov commit 7bab09631c2a303f87a7eb7e3d69e888673b9b7e upstream. The 'dir' parameter in xfrm_migrate() is a user-controlled byte which is used as an array index. This can lead to an out-of-bound access, kernel lockup and DoS. Add a check for the 'dir' value. This fixes CVE-2017-11600. References: https://bugzilla.redhat.com/show_bug.cgi?id=1474928 Fixes: 80c9abaabf42 ("[XFRM]: Extension for dynamic update of endpoint address(es)") Reported-by: "bo Zhang" Signed-off-by: Vladis Dronov Signed-off-by: Steffen Klassert Signed-off-by: Greg Kroah-Hartman --- net/xfrm/xfrm_policy.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -3248,9 +3248,15 @@ int xfrm_migrate(const struct xfrm_selec struct xfrm_state *x_new[XFRM_MAX_DEPTH]; struct xfrm_migrate *mp; + /* Stage 0 - sanity checks */ if ((err = xfrm_migrate_check(m, num_migrate)) < 0) goto out; + if (dir >= XFRM_POLICY_MAX) { + err = -EINVAL; + goto out; + } + /* Stage 1 - find policy */ if ((pol = xfrm_migrate_policy_find(sel, dir, type, net)) == NULL) { err = -ENOENT; Patches currently in stable-queue which might be from vdronov@redhat.com are queue-3.18/xfrm-policy-check-policy-direction-value.patch