From: "Wu, Jiaxin" <jiaxin.wu@intel.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>,
"Wu, Jiaxin" <jiaxin.wu@intel.com>
Cc: "Fu, Siyuan" <siyuan.fu@intel.com>
Subject: Re: [edk2-devel] [PATCH v1] MdeModulePkg/Ip4Dxe: Check the received package length (CVE-2019-14559).
Date: Mon, 17 Feb 2020 07:39:51 +0000 [thread overview]
Message-ID: <895558F6EA4E3B41AC93A00D163B72741701C214@SHSMSX107.ccr.corp.intel.com> (raw)
In-Reply-To: <15F4205BB8F7C9F2.5373@groups.io>
Sorry, please ignore this patch, I will correct the commit log later.
Thanks,
Jiaxin
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Wu,
> Jiaxin
> Sent: Monday, February 17, 2020 3:36 PM
> To: devel@edk2.groups.io
> Cc: Fu, Siyuan <siyuan.fu@intel.com>; Wu, Jiaxin <jiaxin.wu@intel.com>
> Subject: [edk2-devel] [PATCH v1] MdeModulePkg/Ip4Dxe: Check the
> received package length (CVE-2019-14559).
>
> This patch is to check the received package length to make sure the package
> has a valid length field.
>
> Cc: Fu Siyuan <siyuan.fu@intel.com>
> Cc:Maciej Rabeda <maciej.rabeda@linux.intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
> Reviewed-by: Siyuan Fu <siyuan.fu@intel.com>
> ---
> NetworkPkg/Ip4Dxe/Ip4Input.c | 46
> +++++++++++++++++++++++++++++++++++---------
> 1 file changed, 37 insertions(+), 9 deletions(-)
>
> diff --git a/NetworkPkg/Ip4Dxe/Ip4Input.c b/NetworkPkg/Ip4Dxe/Ip4Input.c
> index fec242c71f..3fd08a5231 100644
> --- a/NetworkPkg/Ip4Dxe/Ip4Input.c
> +++ b/NetworkPkg/Ip4Dxe/Ip4Input.c
> @@ -1,9 +1,9 @@
> /** @file
> IP4 input process.
>
> -Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2005 - 2019, Intel Corporation. All rights reserved.<BR>
> (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> **/
> @@ -709,14 +709,10 @@ Ip4PreProcessPacket (
> UINT16 Checksum;
>
> //
> // Check if the IP4 header is correctly formatted.
> //
> - if ((*Packet)->TotalSize < IP4_MIN_HEADLEN) {
> - return EFI_INVALID_PARAMETER;
> - }
> -
> HeadLen = (Head->HeadLen << 2);
> TotalLen = NTOHS (Head->TotalLen);
>
> //
> // Mnp may deliver frame trailer sequence up, trim it off.
> @@ -806,10 +802,34 @@ Ip4PreProcessPacket (
> }
>
> return EFI_SUCCESS;
> }
>
> +/**
> + This function checks the IPv4 packet length.
> +
> + @param[in] Packet Pointer to the IPv4 Packet to be checked.
> +
> + @retval TRUE The input IPv4 packet length is valid.
> + @retval FALSE The input IPv4 packet length is invalid.
> +
> +**/
> +BOOLEAN
> +Ip4IsValidPacketLength (
> + IN NET_BUF *Packet
> + )
> +{
> + //
> + // Check the IP4 packet length.
> + //
> + if (Packet->TotalSize < IP4_MIN_HEADLEN) {
> + return FALSE;
> + }
> +
> + return TRUE;
> +}
> +
> /**
> The IP4 input routine. It is called by the IP4_INTERFACE when a
> IP4 fragment is received from MNP.
>
> @param[in] Ip4Instance The IP4 child that request the receive, most
> like
> @@ -842,10 +862,14 @@ Ip4AccpetFrame (
>
> if (EFI_ERROR (IoStatus) || (IpSb->State == IP4_SERVICE_DESTROY)) {
> goto DROP;
> }
>
> + if (!Ip4IsValidPacketLength (Packet)) {
> + goto RESTART;
> + }
> +
> Head = (IP4_HEAD *) NetbufGetByte (Packet, 0, NULL);
> ASSERT (Head != NULL);
> OptionLen = (Head->HeadLen << 2) - IP4_MIN_HEADLEN;
> if (OptionLen > 0) {
> Option = (UINT8 *) (Head + 1);
> @@ -888,14 +912,18 @@ Ip4AccpetFrame (
> //
> // If the packet is protected by tunnel mode, parse the inner Ip Packet.
> //
> ZeroMem (&ZeroHead, sizeof (IP4_HEAD));
> if (0 == CompareMem (Head, &ZeroHead, sizeof (IP4_HEAD))) {
> - // Packet may have been changed. Head, HeadLen, TotalLen, and
> - // info must be reloaded before use. The ownership of the packet
> - // is transferred to the packet process logic.
> - //
> + // Packet may have been changed. Head, HeadLen, TotalLen, and
> + // info must be reloaded before use. The ownership of the packet
> + // is transferred to the packet process logic.
> + //
> + if (!Ip4IsValidPacketLength (Packet)) {
> + goto RESTART;
> + }
> +
> Head = (IP4_HEAD *) NetbufGetByte (Packet, 0, NULL);
> ASSERT (Head != NULL);
> Status = Ip4PreProcessPacket (
> IpSb,
> &Packet,
> --
> 2.16.2.windows.1
>
>
>
next parent reply other threads:[~2020-02-17 7:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <15F4205BB8F7C9F2.5373@groups.io>
2020-02-17 7:39 ` Wu, Jiaxin [this message]
2020-02-17 7:43 [PATCH v1] MdeModulePkg/Ip4Dxe: Check the received package length (CVE-2019-14559) Wu, Jiaxin
2020-02-17 10:39 ` [edk2-devel] " Laszlo Ersek
2020-02-17 14:26 ` Liming Gao
2020-02-17 21:43 ` Wu, Jiaxin
2020-02-17 21:43 ` Wu, Jiaxin
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