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From ae83afb620d9ee63528c309c242a97fc2c92dc29 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Thu, 8 Feb 2024 10:35:14 -0500
Subject: [PATCH 3/3] NetworkPkg: Dhcp6Dxe: SECURITY PATCH CVE-2023-45230 Unit
Tests
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 45: NetworkPkg: Dhcp6Dxe: SECURITY PATCH CVE-2023-45230 Patch
RH-Jira: RHEL-21996
RH-Acked-by: Gerd Hoffmann <None>
RH-Commit: [3/3] 13b1b35722715ec380605e97a22eb92ca821981b
JIRA: https://issues.redhat.com/browse/RHEL-21996
CVE: CVE-2023-45230
Upstream: Merged
commit 5f3658197bf29c83b3349b0ab1d99cdb0c3814bc
Author: Doug Flick via groups.io <dougflick=microsoft.com@groups.io>
Date: Fri Jan 26 05:54:45 2024 +0800
NetworkPkg: Dhcp6Dxe: SECURITY PATCH CVE-2023-45230 Unit Tests
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4535
Confirms that reported issue...
"Buffer overflow in the DHCPv6 client via a long Server ID option"
..has been corrected by the provided patch.
Tests the following functions to ensure they appropriately handle
untrusted data (either too long or too small) to prevent a buffer
overflow:
Dhcp6AppendOption
Dhcp6AppendETOption
Dhcp6AppendIaOption
Cc: Saloni Kasbekar <saloni.kasbekar@intel.com>
Cc: Zachary Clark-williams <zachary.clark-williams@intel.com>
Signed-off-by: Doug Flick [MSFT] <doug.edk2@gmail.com>
Reviewed-by: Saloni Kasbekar <saloni.kasbekar@intel.com>
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
.../GoogleTest/Dhcp6DxeGoogleTest.cpp | 20 +
.../GoogleTest/Dhcp6DxeGoogleTest.inf | 43 ++
.../Dhcp6Dxe/GoogleTest/Dhcp6IoGoogleTest.cpp | 478 ++++++++++++++++++
NetworkPkg/Test/NetworkPkgHostTest.dsc | 1 +
4 files changed, 542 insertions(+)
create mode 100644 NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.cpp
create mode 100644 NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.inf
create mode 100644 NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6IoGoogleTest.cpp
diff --git a/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.cpp b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.cpp
new file mode 100644
index 0000000000..9aeced2f91
--- /dev/null
+++ b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.cpp
@@ -0,0 +1,20 @@
+/** @file
+ Acts as the main entry point for the tests for the Dhcp6Dxe module.
+
+ Copyright (c) Microsoft Corporation
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#include <gtest/gtest.h>
+
+////////////////////////////////////////////////////////////////////////////////
+// Run the tests
+////////////////////////////////////////////////////////////////////////////////
+int
+main (
+ int argc,
+ char *argv[]
+ )
+{
+ testing::InitGoogleTest (&argc, argv);
+ return RUN_ALL_TESTS ();
+}
diff --git a/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.inf b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.inf
new file mode 100644
index 0000000000..8e9119a371
--- /dev/null
+++ b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.inf
@@ -0,0 +1,43 @@
+## @file
+# Unit test suite for the Dhcp6Dxe using Google Test
+#
+# Copyright (c) Microsoft Corporation.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+[Defines]
+ INF_VERSION = 0x00010017
+ BASE_NAME = Dhcp6DxeGoogleTest
+ FILE_GUID = 1D2A4C65-38C8-4C2F-BB60-B5FA49625AA9
+ VERSION_STRING = 1.0
+ MODULE_TYPE = HOST_APPLICATION
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 AARCH64
+#
+[Sources]
+ Dhcp6DxeGoogleTest.cpp
+ Dhcp6IoGoogleTest.cpp
+ ../Dhcp6Io.c
+ ../Dhcp6Utility.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ UnitTestFrameworkPkg/UnitTestFrameworkPkg.dec
+ NetworkPkg/NetworkPkg.dec
+
+[LibraryClasses]
+ GoogleTestLib
+ DebugLib
+ NetLib
+ PcdLib
+
+[Protocols]
+ gEfiDhcp6ServiceBindingProtocolGuid
+
+[Pcd]
+ gEfiNetworkPkgTokenSpaceGuid.PcdDhcp6UidType
+
+[Guids]
+ gZeroGuid
diff --git a/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6IoGoogleTest.cpp b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6IoGoogleTest.cpp
new file mode 100644
index 0000000000..7ee40e4af4
--- /dev/null
+++ b/NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6IoGoogleTest.cpp
@@ -0,0 +1,478 @@
+/** @file
+ Tests for Dhcp6Io.c.
+
+ Copyright (c) Microsoft Corporation
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+#include <gtest/gtest.h>
+
+extern "C" {
+ #include <Uefi.h>
+ #include <Library/BaseLib.h>
+ #include <Library/DebugLib.h>
+ #include <Library/BaseMemoryLib.h>
+ #include "../Dhcp6Impl.h"
+ #include "../Dhcp6Utility.h"
+}
+
+////////////////////////////////////////////////////////////////////////
+// Defines
+////////////////////////////////////////////////////////////////////////
+
+#define DHCP6_PACKET_MAX_LEN 1500
+
+////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////
+// Symbol Definitions
+// These functions are not directly under test - but required to compile
+////////////////////////////////////////////////////////////////////////
+
+// This definition is used by this test but is also required to compile
+// by Dhcp6Io.c
+EFI_IPv6_ADDRESS mAllDhcpRelayAndServersAddress = {
+ { 0xFF, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2 }
+};
+
+EFI_STATUS
+EFIAPI
+UdpIoSendDatagram (
+ IN UDP_IO *UdpIo,
+ IN NET_BUF *Packet,
+ IN UDP_END_POINT *EndPoint OPTIONAL,
+ IN EFI_IP_ADDRESS *Gateway OPTIONAL,
+ IN UDP_IO_CALLBACK CallBack,
+ IN VOID *Context
+ )
+{
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+UdpIoRecvDatagram (
+ IN UDP_IO *UdpIo,
+ IN UDP_IO_CALLBACK CallBack,
+ IN VOID *Context,
+ IN UINT32 HeadLen
+ )
+{
+ return EFI_SUCCESS;
+}
+
+////////////////////////////////////////////////////////////////////////
+// Dhcp6AppendOptionTest Tests
+////////////////////////////////////////////////////////////////////////
+
+class Dhcp6AppendOptionTest : public ::testing::Test {
+public:
+ UINT8 *Buffer = NULL;
+ EFI_DHCP6_PACKET *Packet;
+
+protected:
+ // Add any setup code if needed
+ virtual void
+ SetUp (
+ )
+ {
+ // Initialize any resources or variables
+ Buffer = (UINT8 *)AllocateZeroPool (DHCP6_PACKET_MAX_LEN);
+ ASSERT_NE (Buffer, (UINT8 *)NULL);
+
+ Packet = (EFI_DHCP6_PACKET *)Buffer;
+ Packet->Size = DHCP6_PACKET_MAX_LEN;
+ }
+
+ // Add any cleanup code if needed
+ virtual void
+ TearDown (
+ )
+ {
+ // Clean up any resources or variables
+ if (Buffer != NULL) {
+ FreePool (Buffer);
+ }
+ }
+};
+
+// Test Description:
+// Attempt to append an option to a packet that is too small by a duid that is too large
+TEST_F (Dhcp6AppendOptionTest, InvalidDataExpectBufferTooSmall) {
+ UINT8 *Cursor;
+ EFI_DHCP6_DUID *UntrustedDuid;
+ EFI_STATUS Status;
+
+ UntrustedDuid = (EFI_DHCP6_DUID *)AllocateZeroPool (sizeof (EFI_DHCP6_DUID));
+ ASSERT_NE (UntrustedDuid, (EFI_DHCP6_DUID *)NULL);
+
+ UntrustedDuid->Length = NTOHS (0xFFFF);
+
+ Cursor = Dhcp6AppendOptionTest::Packet->Dhcp6.Option;
+
+ Status = Dhcp6AppendOption (
+ Dhcp6AppendOptionTest::Packet,
+ &Cursor,
+ HTONS (Dhcp6OptServerId),
+ UntrustedDuid->Length,
+ UntrustedDuid->Duid
+ );
+
+ ASSERT_EQ (Status, EFI_BUFFER_TOO_SMALL);
+}
+
+// Test Description:
+// Attempt to append an option to a packet that is large enough
+TEST_F (Dhcp6AppendOptionTest, ValidDataExpectSuccess) {
+ UINT8 *Cursor;
+ EFI_DHCP6_DUID *UntrustedDuid;
+ EFI_STATUS Status;
+ UINTN OriginalLength;
+
+ UINT8 Duid[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
+
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+ OriginalLength = Packet->Length;
+
+ UntrustedDuid = (EFI_DHCP6_DUID *)AllocateZeroPool (sizeof (EFI_DHCP6_DUID));
+ ASSERT_NE (UntrustedDuid, (EFI_DHCP6_DUID *)NULL);
+
+ UntrustedDuid->Length = NTOHS (sizeof (Duid));
+ CopyMem (UntrustedDuid->Duid, Duid, sizeof (Duid));
+
+ Cursor = Dhcp6AppendOptionTest::Packet->Dhcp6.Option;
+
+ Status = Dhcp6AppendOption (
+ Dhcp6AppendOptionTest::Packet,
+ &Cursor,
+ HTONS (Dhcp6OptServerId),
+ UntrustedDuid->Length,
+ UntrustedDuid->Duid
+ );
+
+ ASSERT_EQ (Status, EFI_SUCCESS);
+
+ // verify that the pointer to cursor moved by the expected amount
+ ASSERT_EQ (Cursor, (UINT8 *)Dhcp6AppendOptionTest::Packet->Dhcp6.Option + sizeof (Duid) + 4);
+
+ // verify that the length of the packet is now the expected amount
+ ASSERT_EQ (Dhcp6AppendOptionTest::Packet->Length, OriginalLength + sizeof (Duid) + 4);
+}
+
+////////////////////////////////////////////////////////////////////////
+// Dhcp6AppendETOption Tests
+////////////////////////////////////////////////////////////////////////
+
+class Dhcp6AppendETOptionTest : public ::testing::Test {
+public:
+ UINT8 *Buffer = NULL;
+ EFI_DHCP6_PACKET *Packet;
+
+protected:
+ // Add any setup code if needed
+ virtual void
+ SetUp (
+ )
+ {
+ // Initialize any resources or variables
+ Buffer = (UINT8 *)AllocateZeroPool (DHCP6_PACKET_MAX_LEN);
+ ASSERT_NE (Buffer, (UINT8 *)NULL);
+
+ Packet = (EFI_DHCP6_PACKET *)Buffer;
+ Packet->Size = DHCP6_PACKET_MAX_LEN;
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+ }
+
+ // Add any cleanup code if needed
+ virtual void
+ TearDown (
+ )
+ {
+ // Clean up any resources or variables
+ if (Buffer != NULL) {
+ FreePool (Buffer);
+ }
+ }
+};
+
+// Test Description:
+// Attempt to append an option to a packet that is too small by a duid that is too large
+TEST_F (Dhcp6AppendETOptionTest, InvalidDataExpectBufferTooSmall) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+ DHCP6_INSTANCE Instance;
+ UINT16 ElapsedTimeVal;
+ UINT16 *ElapsedTime;
+
+ Cursor = Dhcp6AppendETOptionTest::Packet->Dhcp6.Option;
+ ElapsedTime = &ElapsedTimeVal;
+
+ Packet->Length = Packet->Size - 2;
+
+ Status = Dhcp6AppendETOption (
+ Dhcp6AppendETOptionTest::Packet,
+ &Cursor,
+ &Instance, // Instance is not used in this function
+ &ElapsedTime
+ );
+
+ // verify that we error out because the packet is too small for the option header
+ ASSERT_EQ (Status, EFI_BUFFER_TOO_SMALL);
+
+ // reset the length
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+}
+
+// Test Description:
+// Attempt to append an option to a packet that is large enough
+TEST_F (Dhcp6AppendETOptionTest, ValidDataExpectSuccess) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+ DHCP6_INSTANCE Instance;
+ UINT16 ElapsedTimeVal;
+ UINT16 *ElapsedTime;
+ UINTN ExpectedSize;
+ UINTN OriginalLength;
+
+ Cursor = Dhcp6AppendETOptionTest::Packet->Dhcp6.Option;
+ ElapsedTime = &ElapsedTimeVal;
+ ExpectedSize = 6;
+ OriginalLength = Packet->Length;
+
+ Status = Dhcp6AppendETOption (
+ Dhcp6AppendETOptionTest::Packet,
+ &Cursor,
+ &Instance, // Instance is not used in this function
+ &ElapsedTime
+ );
+
+ // verify that the status is EFI_SUCCESS
+ ASSERT_EQ (Status, EFI_SUCCESS);
+
+ // verify that the pointer to cursor moved by the expected amount
+ ASSERT_EQ (Cursor, (UINT8 *)Dhcp6AppendETOptionTest::Packet->Dhcp6.Option + ExpectedSize);
+
+ // verify that the length of the packet is now the expected amount
+ ASSERT_EQ (Dhcp6AppendETOptionTest::Packet->Length, OriginalLength + ExpectedSize);
+}
+
+////////////////////////////////////////////////////////////////////////
+// Dhcp6AppendIaOption Tests
+////////////////////////////////////////////////////////////////////////
+
+class Dhcp6AppendIaOptionTest : public ::testing::Test {
+public:
+ UINT8 *Buffer = NULL;
+ EFI_DHCP6_PACKET *Packet;
+ EFI_DHCP6_IA *Ia;
+
+protected:
+ // Add any setup code if needed
+ virtual void
+ SetUp (
+ )
+ {
+ // Initialize any resources or variables
+ Buffer = (UINT8 *)AllocateZeroPool (DHCP6_PACKET_MAX_LEN);
+ ASSERT_NE (Buffer, (UINT8 *)NULL);
+
+ Packet = (EFI_DHCP6_PACKET *)Buffer;
+ Packet->Size = DHCP6_PACKET_MAX_LEN;
+
+ Ia = (EFI_DHCP6_IA *)AllocateZeroPool (sizeof (EFI_DHCP6_IA) + sizeof (EFI_DHCP6_IA_ADDRESS) * 2);
+ ASSERT_NE (Ia, (EFI_DHCP6_IA *)NULL);
+
+ CopyMem (Ia->IaAddress, mAllDhcpRelayAndServersAddress.Addr, sizeof (EFI_IPv6_ADDRESS));
+ CopyMem (Ia->IaAddress + 1, mAllDhcpRelayAndServersAddress.Addr, sizeof (EFI_IPv6_ADDRESS));
+
+ Ia->IaAddressCount = 2;
+ }
+
+ // Add any cleanup code if needed
+ virtual void
+ TearDown (
+ )
+ {
+ // Clean up any resources or variables
+ if (Buffer != NULL) {
+ FreePool (Buffer);
+ }
+
+ if (Ia != NULL) {
+ FreePool (Ia);
+ }
+ }
+};
+
+// Test Description:
+// Attempt to append an option to a packet that doesn't have enough space
+// for the option header
+TEST_F (Dhcp6AppendIaOptionTest, IaNaInvalidDataExpectBufferTooSmall) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+
+ Packet->Length = Packet->Size - 2;
+
+ Ia->Descriptor.Type = Dhcp6OptIana;
+ Ia->Descriptor.IaId = 0x12345678;
+
+ Cursor = Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option;
+
+ Status = Dhcp6AppendIaOption (
+ Dhcp6AppendIaOptionTest::Packet,
+ &Cursor,
+ Ia,
+ 0x12345678,
+ 0x11111111,
+ Dhcp6OptIana
+ );
+
+ // verify that we error out because the packet is too small for the option header
+ ASSERT_EQ (Status, EFI_BUFFER_TOO_SMALL);
+
+ // reset the length
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+}
+
+// Test Description:
+// Attempt to append an option to a packet that doesn't have enough space
+// for the option header
+TEST_F (Dhcp6AppendIaOptionTest, IaTaInvalidDataExpectBufferTooSmall) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+
+ // Use up nearly all the space in the packet
+ Packet->Length = Packet->Size - 2;
+
+ Ia->Descriptor.Type = Dhcp6OptIata;
+ Ia->Descriptor.IaId = 0x12345678;
+
+ Cursor = Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option;
+
+ Status = Dhcp6AppendIaOption (
+ Dhcp6AppendIaOptionTest::Packet,
+ &Cursor,
+ Ia,
+ 0,
+ 0,
+ Dhcp6OptIata
+ );
+
+ // verify that we error out because the packet is too small for the option header
+ ASSERT_EQ (Status, EFI_BUFFER_TOO_SMALL);
+
+ // reset the length
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+}
+
+TEST_F (Dhcp6AppendIaOptionTest, IaNaValidDataExpectSuccess) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+ UINTN ExpectedSize;
+ UINTN OriginalLength;
+
+ //
+ // 2 bytes for the option header type
+ //
+ ExpectedSize = 2;
+ //
+ // 2 bytes for the option header length
+ //
+ ExpectedSize += 2;
+ //
+ // 4 bytes for the IAID
+ //
+ ExpectedSize += 4;
+ //
+ // + 4 bytes for the T1
+ //
+ ExpectedSize += 4;
+ //
+ // + 4 bytes for the T2
+ //
+ ExpectedSize += 4;
+ //
+ // + (4 + sizeof (EFI_DHCP6_IA_ADDRESS)) * 2;
+ // + 2 bytes for the option header type
+ // + 2 bytes for the option header length
+ // + sizeof (EFI_DHCP6_IA_ADDRESS) for the IA Address
+ //
+ ExpectedSize += (4 + sizeof (EFI_DHCP6_IA_ADDRESS)) * 2;
+
+ Cursor = Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option;
+
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+ OriginalLength = Packet->Length;
+
+ Ia->Descriptor.Type = Dhcp6OptIana;
+ Ia->Descriptor.IaId = 0x12345678;
+
+ Status = Dhcp6AppendIaOption (
+ Dhcp6AppendIaOptionTest::Packet,
+ &Cursor,
+ Ia,
+ 0x12345678,
+ 0x12345678,
+ Dhcp6OptIana
+ );
+
+ // verify that the pointer to cursor moved by the expected amount
+ ASSERT_EQ (Cursor, (UINT8 *)Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option + ExpectedSize);
+
+ // verify that the length of the packet is now the expected amount
+ ASSERT_EQ (Dhcp6AppendIaOptionTest::Packet->Length, OriginalLength + ExpectedSize);
+
+ // verify that the status is EFI_SUCCESS
+ ASSERT_EQ (Status, EFI_SUCCESS);
+}
+
+TEST_F (Dhcp6AppendIaOptionTest, IaTaValidDataExpectSuccess) {
+ UINT8 *Cursor;
+ EFI_STATUS Status;
+ UINTN ExpectedSize;
+ UINTN OriginalLength;
+
+ //
+ // 2 bytes for the option header type
+ //
+ ExpectedSize = 2;
+ //
+ // 2 bytes for the option header length
+ //
+ ExpectedSize += 2;
+ //
+ // 4 bytes for the IAID
+ //
+ ExpectedSize += 4;
+ //
+ // + (4 + sizeof (EFI_DHCP6_IA_ADDRESS)) * 2;
+ // + 2 bytes for the option header type
+ // + 2 bytes for the option header length
+ // + sizeof (EFI_DHCP6_IA_ADDRESS) for the IA Address
+ //
+ ExpectedSize += (4 + sizeof (EFI_DHCP6_IA_ADDRESS)) * 2;
+
+ Cursor = Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option;
+
+ Packet->Length = sizeof (EFI_DHCP6_HEADER);
+ OriginalLength = Packet->Length;
+
+ Ia->Descriptor.Type = Dhcp6OptIata;
+ Ia->Descriptor.IaId = 0x12345678;
+
+ Status = Dhcp6AppendIaOption (
+ Dhcp6AppendIaOptionTest::Packet,
+ &Cursor,
+ Ia,
+ 0,
+ 0,
+ Dhcp6OptIata
+ );
+
+ // verify that the pointer to cursor moved by the expected amount
+ ASSERT_EQ (Cursor, (UINT8 *)Dhcp6AppendIaOptionTest::Packet->Dhcp6.Option + ExpectedSize);
+
+ // verify that the length of the packet is now the expected amount
+ ASSERT_EQ (Dhcp6AppendIaOptionTest::Packet->Length, OriginalLength + ExpectedSize);
+
+ // verify that the status is EFI_SUCCESS
+ ASSERT_EQ (Status, EFI_SUCCESS);
+}
diff --git a/NetworkPkg/Test/NetworkPkgHostTest.dsc b/NetworkPkg/Test/NetworkPkgHostTest.dsc
index 1aeca5c5b3..20bc90b172 100644
--- a/NetworkPkg/Test/NetworkPkgHostTest.dsc
+++ b/NetworkPkg/Test/NetworkPkgHostTest.dsc
@@ -24,6 +24,7 @@
#
# Build HOST_APPLICATION that tests NetworkPkg
#
+ NetworkPkg/Dhcp6Dxe/GoogleTest/Dhcp6DxeGoogleTest.inf
# Despite these library classes being listed in [LibraryClasses] below, they are not needed for the host-based unit tests.
[LibraryClasses]
--
2.39.3
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