Re: [edk2-devel] [PATCH] NetworkPkg:Update Security Fix

["Michael D Kinney" <michael.d.kinney@intel.com>]

Please add Cc: lines to commit message with NetworkPkg 
Maintainers/reviewers.

Thanks,

Mike

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Santhosh
> Kumar V via groups.io
> Sent: Thursday, February 1, 2024 2:33 AM
> To: devel@edk2.groups.io; Santhosh Kumar V <santhoshkumarv@ami.com>
> Cc: Sivaraman Nainar <sivaramann@ami.com>; Raj V Akilan
> <rajva@ami.com>; Mathews, John <john.mathews@intel.com>
> Subject: [edk2-devel] [PATCH] NetworkPkg:Update Security Fix
> 
> Update Security patch for Bug 4541 (Predictable TCP ISNs)
> 
> 
> Signed-off-by: SanthoshKumar <santhoshkumarv@ami.com>
> ---
>  NetworkPkg/Library/DxeNetLib/DxeNetLib.c   | 21 ++++++++++++++-------
>  NetworkPkg/Library/DxeNetLib/DxeNetLib.inf |  2 +-
>  NetworkPkg/TcpDxe/TcpDxe.inf               |  1 +
>  NetworkPkg/TcpDxe/TcpMain.h                |  1 +
>  NetworkPkg/TcpDxe/TcpMisc.c                |  7 ++++++-
>  NetworkPkg/TcpDxe/TcpTimer.c               |  8 +++++---
>  6 files changed, 28 insertions(+), 12 deletions(-)
> 
> diff --git a/NetworkPkg/Library/DxeNetLib/DxeNetLib.c
> b/NetworkPkg/Library/DxeNetLib/DxeNetLib.c
> index fd4a9e15a8..d3cc8a59d4 100644
> --- a/NetworkPkg/Library/DxeNetLib/DxeNetLib.c
> +++ b/NetworkPkg/Library/DxeNetLib/DxeNetLib.c
> @@ -31,6 +31,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
>  #include <Library/DevicePathLib.h>
> 
>  #include <Library/PrintLib.h>
> 
>  #include <Library/UefiLib.h>
> 
> +#include <Library/RngLib.h>
> 
> 
> 
>  #define NIC_ITEM_CONFIG_SIZE  (sizeof (NIC_IP4_CONFIG_INFO) + sizeof
> (EFI_IP4_ROUTE_TABLE) * MAX_IP4_CONFIG_IN_VARIABLE)
> 
>  #define DEFAULT_ZERO_START    ((UINTN) ~0)
> 
> @@ -902,14 +903,20 @@ NetRandomInitSeed (
>    EFI_TIME  Time;
> 
>    UINT32    Seed;
> 
>    UINT64    MonotonicCount;
> 
> +  UINT32    RandomVal;
> 
> +
> 
> +  if ( TRUE == GetRandomNumber32(&RandomVal))
> 
> +    Seed = RandomVal;
> 
> +  else
> 
> +  {
> 
> +    gRT->GetTime (&Time, NULL);
> 
> +    Seed  = (Time.Hour << 24 | Time.Day << 16 | Time.Minute << 8 |
> Time.Second);
> 
> +    Seed ^= Time.Nanosecond;
> 
> +    Seed ^= Time.Year << 7;
> 
> 
> 
> -  gRT->GetTime (&Time, NULL);
> 
> -  Seed  = (Time.Hour << 24 | Time.Day << 16 | Time.Minute << 8 |
> Time.Second);
> 
> -  Seed ^= Time.Nanosecond;
> 
> -  Seed ^= Time.Year << 7;
> 
> -
> 
> -  gBS->GetNextMonotonicCount (&MonotonicCount);
> 
> -  Seed += (UINT32)MonotonicCount;
> 
> +    gBS->GetNextMonotonicCount (&MonotonicCount);
> 
> +    Seed += (UINT32)MonotonicCount;
> 
> +  }
> 
> 
> 
>    return Seed;
> 
>  }
> 
> diff --git a/NetworkPkg/Library/DxeNetLib/DxeNetLib.inf
> b/NetworkPkg/Library/DxeNetLib/DxeNetLib.inf
> index 8145d256ec..2c800b7c00 100644
> --- a/NetworkPkg/Library/DxeNetLib/DxeNetLib.inf
> +++ b/NetworkPkg/Library/DxeNetLib/DxeNetLib.inf
> @@ -43,7 +43,7 @@
>    MemoryAllocationLib
> 
>    DevicePathLib
> 
>    PrintLib
> 
> -
> 
> +  RngLib
> 
> 
> 
>  [Guids]
> 
>    gEfiSmbiosTableGuid                           ## SOMETIMES_CONSUMES
> ## SystemTable
> 
> diff --git a/NetworkPkg/TcpDxe/TcpDxe.inf
> b/NetworkPkg/TcpDxe/TcpDxe.inf
> index c0acbdca57..99c093600f 100644
> --- a/NetworkPkg/TcpDxe/TcpDxe.inf
> +++ b/NetworkPkg/TcpDxe/TcpDxe.inf
> @@ -67,6 +67,7 @@
>    DpcLib
> 
>    NetLib
> 
>    IpIoLib
> 
> +  RngLib
> 
> 
> 
> 
> 
>  [Protocols]
> 
> diff --git a/NetworkPkg/TcpDxe/TcpMain.h b/NetworkPkg/TcpDxe/TcpMain.h
> index c0c9b7f46e..f94598b6ba 100644
> --- a/NetworkPkg/TcpDxe/TcpMain.h
> +++ b/NetworkPkg/TcpDxe/TcpMain.h
> @@ -16,6 +16,7 @@
>  #include <Library/IpIoLib.h>
> 
>  #include <Library/DevicePathLib.h>
> 
>  #include <Library/PrintLib.h>
> 
> +#include <Library/RngLib.h>
> 
> 
> 
>  #include "Socket.h"
> 
>  #include "TcpProto.h"
> 
> diff --git a/NetworkPkg/TcpDxe/TcpMisc.c b/NetworkPkg/TcpDxe/TcpMisc.c
> index c93212d47d..4d33dd6ad6 100644
> --- a/NetworkPkg/TcpDxe/TcpMisc.c
> +++ b/NetworkPkg/TcpDxe/TcpMisc.c
> @@ -516,7 +516,12 @@ TcpGetIss (
>    VOID
> 
>    )
> 
>  {
> 
> -  mTcpGlobalIss += TCP_ISS_INCREMENT_1;
> 
> +  UINT32        RandomVal;
> 
> +  if ( TRUE == GetRandomNumber32(&RandomVal))
> 
> +    mTcpGlobalIss += RandomVal;
> 
> +  else
> 
> +    mTcpGlobalIss += TCP_ISS_INCREMENT_1;
> 
> +
> 
>    return mTcpGlobalIss;
> 
>  }
> 
> 
> 
> diff --git a/NetworkPkg/TcpDxe/TcpTimer.c
> b/NetworkPkg/TcpDxe/TcpTimer.c
> index 5d2e124977..3370e6b264 100644
> --- a/NetworkPkg/TcpDxe/TcpTimer.c
> +++ b/NetworkPkg/TcpDxe/TcpTimer.c
> @@ -481,10 +481,12 @@ TcpTickingDpc (
>    LIST_ENTRY  *Next;
> 
>    TCP_CB      *Tcb;
> 
>    INT16       Index;
> 
> -
> 
> +  UINT32        RandomVal;
> 
>    mTcpTick++;
> 
> -  mTcpGlobalIss += TCP_ISS_INCREMENT_2;
> 
> -
> 
> +  if ( TRUE == GetRandomNumber32(&RandomVal))
> 
> +    mTcpGlobalIss += RandomVal
> 
> +  else
> 
> +    mTcpGlobalIss += TCP_ISS_INCREMENT_2;
> 
>    //
> 
>    // Don't use LIST_FOR_EACH, which isn't delete safe.
> 
>    //
> 
> --
> 2.42.0.windows.2
> -The information contained in this message may be confidential and
> proprietary to American Megatrends (AMI). This communication is
> intended to be read only by the individual or entity to whom it is
> addressed or by their designee. If the reader of this message is not
> the intended recipient, you are on notice that any distribution of this
> message, in any form, is strictly prohibited. Please promptly notify
> the sender by reply e-mail or by telephone at 770-246-8600, and then
> delete or destroy all copies of the transmission.
> 
> 
> 
> 



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#115068): https://edk2.groups.io/g/devel/message/115068
Mute This Topic: https://groups.io/mt/104108873/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-