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edk2/0059-NetworkPkg-Dhcp6Dxe-SECURITY-PATCH-CVE-2023-45229-Pa.patch
yexiao 9fe974a680 Fix some CVE 
Fix CVE-2023-45229、CVE-2023-45230、CVE-2023-45231、
CVE-2023-45232、CVE-2023-45233、CVE-2023-45234、CVE-2023-45235

Signed-off-by: yexiao <yexiao7@huawei.com>
2024-03-03 17:53:43 +08:00

595 lines
22 KiB
Diff
Raw Blame History

From c26e6df4c87cceef2ec0675d8f319f0bb937e55f Mon Sep 17 00:00:00 2001
From: adttil <13380049+adttil@user.noreply.gitee.com>
Date: Sat, 24 Feb 2024 14:17:52 +0800
Subject: [PATCH 04/13] NetworkPkg: Dhcp6Dxe: SECURITY PATCH CVE-2023-45229
Patch
Bug Details:
PixieFail Bug #1
CVE-2023-45229
CVSS 6.5 : CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-125 Out-of-bounds Read
Change Overview:
Introduce Dhcp6SeekInnerOptionSafe which performs checks before seeking
the Inner Option from a DHCP6 Option.
>
> EFI_STATUS
> Dhcp6SeekInnerOptionSafe (
> IN UINT16 IaType,
> IN UINT8 *Option,
> IN UINT32 OptionLen,
> OUT UINT8 **IaInnerOpt,
> OUT UINT16 *IaInnerLen
> );
>
Lots of code cleanup to improve code readability.
Signed-off-by: Doug Flick [MSFT] <doug.edk2@gmail.com>
ref: https://github.com/tianocore/edk2/commit/1dbb10cc52dc8ef49bb700daa1cefc76b26d52e0
Signed-off-by: yexiao yexiao7@huawei.com
---
NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h | 138 +++++++++++++++++++---
NetworkPkg/Dhcp6Dxe/Dhcp6Io.c | 200 +++++++++++++++++++++-----------
2 files changed, 253 insertions(+), 85 deletions(-)
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
index b3c9784e..dd7afd4a 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Impl.h
@@ -47,6 +47,20 @@ typedef struct _DHCP6_INSTANCE DHCP6_INSTANCE;
#define DHCP6_SERVICE_SIGNATURE SIGNATURE_32 ('D', 'H', '6', 'S')
#define DHCP6_INSTANCE_SIGNATURE SIGNATURE_32 ('D', 'H', '6', 'I')
+#define DHCP6_PACKET_ALL 0
+#define DHCP6_PACKET_STATEFUL 1
+#define DHCP6_PACKET_STATELESS 2
+
+#define DHCP6_BASE_PACKET_SIZE 1024
+
+#define DHCP6_PORT_CLIENT 546
+#define DHCP6_PORT_SERVER 547
+
+#define DHCP_CHECK_MEDIA_WAITING_TIME EFI_TIMER_PERIOD_SECONDS(20)
+
+#define DHCP6_INSTANCE_FROM_THIS(Instance) CR ((Instance), DHCP6_INSTANCE, Dhcp6, DHCP6_INSTANCE_SIGNATURE)
+#define DHCP6_SERVICE_FROM_THIS(Service) CR ((Service), DHCP6_SERVICE, ServiceBinding, DHCP6_SERVICE_SIGNATURE)
+
//
// For more information on DHCP options see RFC 8415, Section 21.1
//
@@ -61,12 +75,10 @@ typedef struct _DHCP6_INSTANCE DHCP6_INSTANCE;
// | (option-len octets) |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//
-#define DHCP6_SIZE_OF_OPT_CODE (sizeof(UINT16))
-#define DHCP6_SIZE_OF_OPT_LEN (sizeof(UINT16))
+#define DHCP6_SIZE_OF_OPT_CODE (sizeof (((EFI_DHCP6_PACKET_OPTION *)0)->OpCode))
+#define DHCP6_SIZE_OF_OPT_LEN (sizeof (((EFI_DHCP6_PACKET_OPTION *)0)->OpLen))
-//
// Combined size of Code and Length
-//
#define DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN (DHCP6_SIZE_OF_OPT_CODE + \
DHCP6_SIZE_OF_OPT_LEN)
@@ -75,34 +87,122 @@ STATIC_ASSERT (
"Combined size of Code and Length must be 4 per RFC 8415"
);
-//
// Offset to the length is just past the code
-//
-#define DHCP6_OPT_LEN_OFFSET(a) (a + DHCP6_SIZE_OF_OPT_CODE)
+#define DHCP6_OFFSET_OF_OPT_LEN(a) (a + DHCP6_SIZE_OF_OPT_CODE)
STATIC_ASSERT (
- DHCP6_OPT_LEN_OFFSET (0) == 2,
+ DHCP6_OFFSET_OF_OPT_LEN (0) == 2,
"Offset of length is + 2 past start of option"
);
-#define DHCP6_OPT_DATA_OFFSET(a) (a + DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN)
+#define DHCP6_OFFSET_OF_OPT_DATA(a) (a + DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN)
STATIC_ASSERT (
- DHCP6_OPT_DATA_OFFSET (0) == 4,
+ DHCP6_OFFSET_OF_OPT_DATA (0) == 4,
"Offset to option data should be +4 from start of option"
);
+//
+// Identity Association options (both NA (Non-Temporary) and TA (Temporary Association))
+// are defined in RFC 8415 and are a deriviation of a TLV stucture
+// For more information on IA_NA see Section 21.4
+// For more information on IA_TA see Section 21.5
+//
+//
+// The format of IA_NA and IA_TA option:
+//
+// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | OPTION_IA_NA | option-len |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | IAID (4 octets) |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | T1 (only for IA_NA) |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | T2 (only for IA_NA) |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | |
+// . IA_NA-options/IA_TA-options .
+// . .
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//
+#define DHCP6_SIZE_OF_IAID (sizeof(UINT32))
+#define DHCP6_SIZE_OF_TIME_INTERVAL (sizeof(UINT32))
-#define DHCP6_PACKET_ALL 0
-#define DHCP6_PACKET_STATEFUL 1
-#define DHCP6_PACKET_STATELESS 2
+// Combined size of IAID, T1, and T2
+#define DHCP6_SIZE_OF_COMBINED_IAID_T1_T2 (DHCP6_SIZE_OF_IAID + \
+ DHCP6_SIZE_OF_TIME_INTERVAL + \
+ DHCP6_SIZE_OF_TIME_INTERVAL)
+STATIC_ASSERT (
+ DHCP6_SIZE_OF_COMBINED_IAID_T1_T2 == 12,
+ "Combined size of IAID, T1, T2 must be 12 per RFC 8415"
+ );
-#define DHCP6_BASE_PACKET_SIZE 1024
+// This is the size of IA_TA without options
+#define DHCP6_MIN_SIZE_OF_IA_TA (DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN + \
+ DHCP6_SIZE_OF_IAID)
+STATIC_ASSERT (
+ DHCP6_MIN_SIZE_OF_IA_TA == 8,
+ "Minimum combined size of IA_TA per RFC 8415"
+ );
-#define DHCP6_PORT_CLIENT 546
-#define DHCP6_PORT_SERVER 547
+// Offset to a IA_TA inner option
+#define DHCP6_OFFSET_OF_IA_TA_INNER_OPT(a) (a + DHCP6_MIN_SIZE_OF_IA_TA)
+STATIC_ASSERT (
+ DHCP6_OFFSET_OF_IA_TA_INNER_OPT (0) == 8,
+ "Offset of IA_TA Inner option is + 8 past start of option"
+ );
+
+// This is the size of IA_NA without options (16)
+#define DHCP6_MIN_SIZE_OF_IA_NA DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN + \
+ DHCP6_SIZE_OF_COMBINED_IAID_T1_T2
+STATIC_ASSERT (
+ DHCP6_MIN_SIZE_OF_IA_NA == 16,
+ "Minimum combined size of IA_TA per RFC 8415"
+ );
+
+#define DHCP6_OFFSET_OF_IA_NA_INNER_OPT(a) (a + DHCP6_MIN_SIZE_OF_IA_NA)
+STATIC_ASSERT (
+ DHCP6_OFFSET_OF_IA_NA_INNER_OPT (0) == 16,
+ "Offset of IA_NA Inner option is + 16 past start of option"
+ );
+
+#define DHCP6_OFFSET_OF_IA_NA_T1(a) (a + \
+ DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN + \
+ DHCP6_SIZE_OF_IAID)
+STATIC_ASSERT (
+ DHCP6_OFFSET_OF_IA_NA_T1 (0) == 8,
+ "Offset of IA_NA Inner option is + 8 past start of option"
+ );
-#define DHCP_CHECK_MEDIA_WAITING_TIME EFI_TIMER_PERIOD_SECONDS(20)
+#define DHCP6_OFFSET_OF_IA_NA_T2(a) (a + \
+ DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN +\
+ DHCP6_SIZE_OF_IAID + \
+ DHCP6_SIZE_OF_TIME_INTERVAL)
+STATIC_ASSERT (
+ DHCP6_OFFSET_OF_IA_NA_T2 (0) == 12,
+ "Offset of IA_NA Inner option is + 12 past start of option"
+ );
-#define DHCP6_INSTANCE_FROM_THIS(Instance) CR ((Instance), DHCP6_INSTANCE, Dhcp6, DHCP6_INSTANCE_SIGNATURE)
-#define DHCP6_SERVICE_FROM_THIS(Service) CR ((Service), DHCP6_SERVICE, ServiceBinding, DHCP6_SERVICE_SIGNATURE)
+//
+// For more information see RFC 8415 Section 21.13
+//
+// The format of the Status Code Option:
+//
+// 0 1 2 3
+// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | OPTION_STATUS_CODE | option-len |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// | status-code | |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
+// . .
+// . status-message .
+// . .
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//
+#define DHCP6_OFFSET_OF_STATUS_CODE(a) (a + DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN)
+STATIC_ASSERT (
+ DHCP6_OFFSET_OF_STATUS_CODE (0) == 4,
+ "Offset of status is + 4 past start of option"
+ );
extern EFI_IPv6_ADDRESS mAllDhcpRelayAndServersAddress;
extern EFI_DHCP6_PROTOCOL gDhcp6ProtocolTemplate;
diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c b/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
index 71201ea7..db1ee4af 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
@@ -611,8 +611,8 @@ Dhcp6UpdateIaInfo (
// The inner options still start with 2 bytes option-code and 2 bytes option-len.
//
if (Instance->Config->IaDescriptor.Type == Dhcp6OptIana) {
- T1 = NTOHL (ReadUnaligned32 ((UINT32 *) (Option + 8)));
- T2 = NTOHL (ReadUnaligned32 ((UINT32 *) (Option + 12)));
+ T1 = NTOHL (ReadUnaligned32 ((UINT32 *)(DHCP6_OFFSET_OF_IA_NA_T1 (Option))));
+ T2 = NTOHL (ReadUnaligned32 ((UINT32 *)(DHCP6_OFFSET_OF_IA_NA_T2 (Option))));
//
// Refer to RFC3155 Chapter 22.4. If a client receives an IA_NA with T1 greater than T2,
// and both T1 and T2 are greater than 0, the client discards the IA_NA option and processes
@@ -621,13 +621,14 @@ Dhcp6UpdateIaInfo (
if (T1 > T2 && T2 > 0) {
return EFI_DEVICE_ERROR;
}
- IaInnerOpt = Option + 16;
- IaInnerLen = (UINT16) (NTOHS (ReadUnaligned16 ((UINT16 *) (Option + 2))) - 12);
+ IaInnerOpt = DHCP6_OFFSET_OF_IA_NA_INNER_OPT (Option);
+ IaInnerLen = (UINT16)(NTOHS (ReadUnaligned16 ((UINT16 *)(DHCP6_OFFSET_OF_OPT_LEN (Option)))) - DHCP6_SIZE_OF_COMBINED_IAID_T1_T2);
} else {
T1 = 0;
T2 = 0;
- IaInnerOpt = Option + 8;
- IaInnerLen = (UINT16) (NTOHS (ReadUnaligned16 ((UINT16 *) (Option + 2))) - 4);
+
+ IaInnerOpt = DHCP6_OFFSET_OF_IA_TA_INNER_OPT (Option);
+ IaInnerLen = (UINT16)(NTOHS (ReadUnaligned16 ((UINT16 *)(DHCP6_OFFSET_OF_OPT_LEN (Option)))) - DHCP6_SIZE_OF_IAID);
}
//
@@ -653,7 +654,7 @@ Dhcp6UpdateIaInfo (
Option = Dhcp6SeekOption (IaInnerOpt, IaInnerLen, Dhcp6OptStatusCode);
if (Option != NULL) {
- StsCode = NTOHS (ReadUnaligned16 ((UINT16 *) (Option + 4)));
+ StsCode = NTOHS (ReadUnaligned16 ((UINT16 *)(DHCP6_OFFSET_OF_OPT_LEN (Option))));
if (StsCode != Dhcp6StsSuccess) {
return EFI_DEVICE_ERROR;
}
@@ -673,7 +674,86 @@ Dhcp6UpdateIaInfo (
return Status;
}
-
+/**
+ Seeks the Inner Options from a DHCP6 Option
+
+ @param[in] IaType The type of the IA option.
+ @param[in] Option The pointer to the DHCP6 Option.
+ @param[in] OptionLen The length of the DHCP6 Option.
+ @param[out] IaInnerOpt The pointer to the IA inner option.
+ @param[out] IaInnerLen The length of the IA inner option.
+
+ @retval EFI_SUCCESS Seek the inner option successfully.
+ @retval EFI_DEVICE_ERROR The OptionLen is invalid. On Error,
+ the pointers are not modified
+**/
+EFI_STATUS
+Dhcp6SeekInnerOptionSafe (
+ IN UINT16 IaType,
+ IN UINT8 *Option,
+ IN UINT32 OptionLen,
+ OUT UINT8 **IaInnerOpt,
+ OUT UINT16 *IaInnerLen
+ )
+{
+ UINT16 IaInnerLenTmp;
+ UINT8 *IaInnerOptTmp;
+
+ if (Option == NULL) {
+ ASSERT (Option != NULL);
+ return EFI_DEVICE_ERROR;
+ }
+
+ if (IaInnerOpt == NULL) {
+ ASSERT (IaInnerOpt != NULL);
+ return EFI_DEVICE_ERROR;
+ }
+
+ if (IaInnerLen == NULL) {
+ ASSERT (IaInnerLen != NULL);
+ return EFI_DEVICE_ERROR;
+ }
+
+ if (IaType == Dhcp6OptIana) {
+ // Verify we have a fully formed IA_NA
+ if (OptionLen < DHCP6_MIN_SIZE_OF_IA_NA) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ IaInnerOptTmp = DHCP6_OFFSET_OF_IA_NA_INNER_OPT (Option);
+
+ // Verify the IaInnerLen is valid.
+ IaInnerLenTmp = (UINT16)NTOHS (ReadUnaligned16 ((UINT16 *)DHCP6_OFFSET_OF_OPT_LEN (Option)));
+ if (IaInnerLenTmp < DHCP6_SIZE_OF_COMBINED_IAID_T1_T2) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ IaInnerLenTmp -= DHCP6_SIZE_OF_COMBINED_IAID_T1_T2;
+ } else if (IaType == Dhcp6OptIata) {
+ // Verify the OptionLen is valid.
+ if (OptionLen < DHCP6_MIN_SIZE_OF_IA_TA) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ IaInnerOptTmp = DHCP6_OFFSET_OF_IA_TA_INNER_OPT (Option);
+
+ // Verify the IaInnerLen is valid.
+ IaInnerLenTmp = (UINT16)NTOHS (ReadUnaligned16 ((UINT16 *)(DHCP6_OFFSET_OF_OPT_LEN (Option))));
+ if (IaInnerLenTmp < DHCP6_SIZE_OF_IAID) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ IaInnerLenTmp -= DHCP6_SIZE_OF_IAID;
+ } else {
+ return EFI_DEVICE_ERROR;
+ }
+
+ *IaInnerOpt = IaInnerOptTmp;
+ *IaInnerLen = IaInnerLenTmp;
+
+ return EFI_SUCCESS;
+}
/**
Seek StatusCode Option in package. A Status Code option may appear in the
@@ -698,6 +778,12 @@ Dhcp6SeekStsOption (
UINT8 *IaInnerOpt;
UINT16 IaInnerLen;
UINT16 StsCode;
+ UINT32 OptionLen;
+
+ // OptionLen is the length of the Options excluding the DHCP header.
+ // Length of the EFI_DHCP6_PACKET from the first byte of the Header field to the last
+ // byte of the Option[] field.
+ OptionLen = Packet->Length - sizeof (Packet->Dhcp6.Header);
//
// Seek StatusCode option directly in DHCP message body. That is, search in
@@ -705,12 +791,12 @@ Dhcp6SeekStsOption (
//
*Option = Dhcp6SeekOption (
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ OptionLen,
Dhcp6OptStatusCode
);
if (*Option != NULL) {
- StsCode = NTOHS (ReadUnaligned16 ((UINT16 *) (*Option + 4)));
+ StsCode = NTOHS (ReadUnaligned16 ((UINT16 *)(DHCP6_OFFSET_OF_STATUS_CODE (*Option))));
if (StsCode != Dhcp6StsSuccess) {
return EFI_DEVICE_ERROR;
}
@@ -721,7 +807,7 @@ Dhcp6SeekStsOption (
//
*Option = Dhcp6SeekIaOption (
Packet->Dhcp6.Option,
- Packet->Length - sizeof (EFI_DHCP6_HEADER),
+ OptionLen,
&Instance->Config->IaDescriptor
);
if (*Option == NULL) {
@@ -729,52 +815,34 @@ Dhcp6SeekStsOption (
}
//
- // The format of the IA_NA option is:
+ // Calculate the distance from Packet->Dhcp6.Option to the IA option.
//
- // 0 1 2 3
- // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | OPTION_IA_NA | option-len |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | IAID (4 octets) |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | T1 |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | T2 |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | |
- // . IA_NA-options .
- // . .
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- //
- // The format of the IA_TA option is:
+ // Packet->Size and Packet->Length are both UINT32 type, and Packet->Size is
+ // the size of the whole packet, including the DHCP header, and Packet->Length
+ // is the length of the DHCP message body, excluding the DHCP header.
//
- // 0 1 2 3
- // 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | OPTION_IA_TA | option-len |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | IAID (4 octets) |
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- // | |
- // . IA_TA-options .
- // . .
- // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ // (*Option - Packet->Dhcp6.Option) is the number of bytes from the start of
+ // DHCP6 option area to the start of the IA option.
//
-
+ // Dhcp6SeekInnerOptionSafe() is searching starting from the start of the
+ // IA option to the end of the DHCP6 option area, thus subtract the space
+ // up until this option
//
- // sizeof (option-code + option-len + IaId) = 8
- // sizeof (option-code + option-len + IaId + T1) = 12
- // sizeof (option-code + option-len + IaId + T1 + T2) = 16
+ OptionLen = OptionLen - (*Option - Packet->Dhcp6.Option);
//
- // The inner options still start with 2 bytes option-code and 2 bytes option-len.
+ // Seek the inner option
//
- if (Instance->Config->IaDescriptor.Type == Dhcp6OptIana) {
- IaInnerOpt = *Option + 16;
- IaInnerLen = (UINT16) (NTOHS (ReadUnaligned16 ((UINT16 *) (*Option + 2))) - 12);
- } else {
- IaInnerOpt = *Option + 8;
- IaInnerLen = (UINT16) (NTOHS (ReadUnaligned16 ((UINT16 *) (*Option + 2))) - 4);
+ if (EFI_ERROR (
+ Dhcp6SeekInnerOptionSafe (
+ Instance->Config->IaDescriptor.Type,
+ *Option,
+ OptionLen,
+ &IaInnerOpt,
+ &IaInnerLen
+ )
+ ))
+ {
+ return EFI_DEVICE_ERROR;
}
//
@@ -798,7 +866,7 @@ Dhcp6SeekStsOption (
//
*Option = Dhcp6SeekOption (IaInnerOpt, IaInnerLen, Dhcp6OptStatusCode);
if (*Option != NULL) {
- StsCode = NTOHS (ReadUnaligned16 ((UINT16 *) (*Option + 4)));
+ StsCode = NTOHS (ReadUnaligned16 ((UINT16 *)((DHCP6_OFFSET_OF_STATUS_CODE (*Option)))));
if (StsCode != Dhcp6StsSuccess) {
return EFI_DEVICE_ERROR;
}
@@ -1124,7 +1192,7 @@ Dhcp6SendRequestMsg (
//
Option = Dhcp6SeekOption (
Instance->AdSelect->Dhcp6.Option,
- Instance->AdSelect->Length - 4,
+ Instance->AdSelect->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerId
);
if (Option == NULL) {
@@ -1310,7 +1378,7 @@ Dhcp6SendDeclineMsg (
//
Option = Dhcp6SeekOption (
LastReply->Dhcp6.Option,
- LastReply->Length - 4,
+ LastReply->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerId
);
if (Option == NULL) {
@@ -1472,7 +1540,7 @@ Dhcp6SendReleaseMsg (
//
Option = Dhcp6SeekOption (
LastReply->Dhcp6.Option,
- LastReply->Length - 4,
+ LastReply->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerId
);
if (Option == NULL) {
@@ -1700,7 +1768,7 @@ Dhcp6SendRenewRebindMsg (
Option = Dhcp6SeekOption (
LastReply->Dhcp6.Option,
- LastReply->Length - 4,
+ LastReply->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerId
);
if (Option == NULL) {
@@ -2245,7 +2313,7 @@ Dhcp6HandleReplyMsg (
//
Option = Dhcp6SeekOption (
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ Packet->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptRapidCommit
);
@@ -2393,7 +2461,7 @@ Dhcp6HandleReplyMsg (
//
// Any error status code option is found.
//
- StsCode = NTOHS (ReadUnaligned16 ((UINT16 *) (Option + 4)));
+ StsCode = NTOHS (ReadUnaligned16 ((UINT16 *)((DHCP6_OFFSET_OF_STATUS_CODE (Option)))));
switch (StsCode) {
case Dhcp6StsUnspecFail:
//
@@ -2524,7 +2592,7 @@ Dhcp6SelectAdvertiseMsg (
//
Option = Dhcp6SeekOption(
AdSelect->Dhcp6.Option,
- AdSelect->Length - 4,
+ AdSelect->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerUnicast
);
@@ -2536,7 +2604,7 @@ Dhcp6SelectAdvertiseMsg (
return EFI_OUT_OF_RESOURCES;
}
- CopyMem (Instance->Unicast, Option + 4, sizeof(EFI_IPv6_ADDRESS));
+ CopyMem (Instance->Unicast, DHCP6_OFFSET_OF_OPT_DATA (Option), sizeof (EFI_IPv6_ADDRESS));
}
//
@@ -2590,7 +2658,7 @@ Dhcp6HandleAdvertiseMsg (
//
Option = Dhcp6SeekOption(
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ Packet->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptRapidCommit
);
@@ -2686,7 +2754,7 @@ Dhcp6HandleAdvertiseMsg (
CopyMem (Instance->AdSelect, Packet, Packet->Size);
if (Option != NULL) {
- Instance->AdPref = *(Option + 4);
+ Instance->AdPref = *(DHCP6_OFFSET_OF_OPT_DATA (Option));
}
} else {
//
@@ -2757,11 +2825,11 @@ Dhcp6HandleStateful (
//
Option = Dhcp6SeekOption(
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ Packet->Length - DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN,
Dhcp6OptClientId
);
- if (Option == NULL || CompareMem (Option + 4, ClientId->Duid, ClientId->Length) != 0) {
+ if ((Option == NULL) || (CompareMem (DHCP6_OFFSET_OF_OPT_DATA (Option), ClientId->Duid, ClientId->Length) != 0)) {
goto ON_CONTINUE;
}
@@ -2770,7 +2838,7 @@ Dhcp6HandleStateful (
//
Option = Dhcp6SeekOption(
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ Packet->Length - DHCP6_SIZE_OF_COMBINED_CODE_AND_LEN,
Dhcp6OptServerId
);
@@ -2875,7 +2943,7 @@ Dhcp6HandleStateless (
//
Option = Dhcp6SeekOption (
Packet->Dhcp6.Option,
- Packet->Length - 4,
+ Packet->Length - sizeof (EFI_DHCP6_HEADER),
Dhcp6OptServerId
);
--
2.33.0
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