163 lines
5.3 KiB
Diff
163 lines
5.3 KiB
Diff
From bb9d1831fd53d43889112a2e30a52b2c4504fdae Mon Sep 17 00:00:00 2001
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From: Jon Maloy <jmaloy@redhat.com>
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Date: Fri, 16 Feb 2024 10:48:05 -0500
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Subject: [PATCH 16/18] NetworkPkg: Dhcp6Dxe: Removes duplicate check and
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replaces with macro
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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RH-MergeRequest: 54: NetworkPkg: Dhcp6Dxe: SECURITY PATCH CVE-2023-45230 Patch
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RH-Jira: RHEL-21841 RHEL-21843 RHEL-21845 RHEL-21847 RHEL-21849 RHEL-21851 RHEL-21853
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RH-Acked-by: Gerd Hoffmann <None>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Commit: [16/18] 61914482aa965883b1ec3f29cf6143b67e88742a
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JIRA: https://issues.redhat.com/browse/RHEL-21841
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CVE: CVE-2023-45229
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Upstream: Merged
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commit af3fad99d6088881562e50149f414f76a5be0140
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Author: Doug Flick <dougflick@microsoft.com>
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Date: Tue Feb 13 10:46:01 2024 -0800
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NetworkPkg: Dhcp6Dxe: Removes duplicate check and replaces with macro
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Removes duplicate check after merge
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>
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> //
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> // Verify the PacketCursor is within the packet
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> //
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> if ( (*PacketCursor < Packet->Dhcp6.Option)
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> || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size -
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sizeof (EFI_DHCP6_HEADER))))
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> {
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> return EFI_INVALID_PARAMETER;
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> }
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>
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Converts the check to a macro and replaces all instances of the check
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with the macro
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Cc: Saloni Kasbekar <saloni.kasbekar@intel.com>
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Cc: Zachary Clark-williams <zachary.clark-williams@intel.com>
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Signed-off-by: Doug Flick [MSFT] <doug.edk2@gmail.com>
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Reviewed-by: Saloni Kasbekar <saloni.kasbekar@intel.com>
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Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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---
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NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c | 44 +++++++++++++-----------------
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1 file changed, 19 insertions(+), 25 deletions(-)
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diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
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index 705c665c51..e4e0725622 100644
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--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
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+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
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@@ -10,6 +10,16 @@
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#include "Dhcp6Impl.h"
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+//
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+// Verifies the packet cursor is within the packet
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+// otherwise it is invalid
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+//
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+#define IS_INVALID_PACKET_CURSOR(PacketCursor, Packet) \
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+ (((*PacketCursor) < (Packet)->Dhcp6.Option) || \
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+ ((*PacketCursor) >= (Packet)->Dhcp6.Option + ((Packet)->Size - sizeof(EFI_DHCP6_HEADER))) \
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+ ) \
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+
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+
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/**
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Generate client Duid in the format of Duid-llt.
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@@ -638,9 +648,7 @@ Dhcp6AppendOption (
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//
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// Verify the PacketCursor is within the packet
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//
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- if ( (*PacketCursor < Packet->Dhcp6.Option)
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- || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size - sizeof (EFI_DHCP6_HEADER))))
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- {
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+ if (IS_INVALID_PACKET_CURSOR (PacketCursor, Packet)) {
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return EFI_INVALID_PARAMETER;
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}
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@@ -657,15 +665,6 @@ Dhcp6AppendOption (
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return EFI_BUFFER_TOO_SMALL;
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}
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- //
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- // Verify the PacketCursor is within the packet
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- //
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- if ( (*PacketCursor < Packet->Dhcp6.Option)
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- || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size - sizeof (EFI_DHCP6_HEADER))))
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- {
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- return EFI_INVALID_PARAMETER;
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- }
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-
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WriteUnaligned16 ((UINT16 *)*PacketCursor, OptType);
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*PacketCursor += DHCP6_SIZE_OF_OPT_CODE;
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WriteUnaligned16 ((UINT16 *)*PacketCursor, OptLen);
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@@ -744,9 +743,7 @@ Dhcp6AppendIaAddrOption (
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//
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// Verify the PacketCursor is within the packet
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//
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- if ( (*PacketCursor < Packet->Dhcp6.Option)
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- || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size - sizeof (EFI_DHCP6_HEADER))))
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- {
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+ if (IS_INVALID_PACKET_CURSOR (PacketCursor, Packet)) {
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return EFI_INVALID_PARAMETER;
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}
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@@ -877,9 +874,7 @@ Dhcp6AppendIaOption (
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//
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// Verify the PacketCursor is within the packet
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//
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- if ( (*PacketCursor < Packet->Dhcp6.Option)
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- || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size - sizeof (EFI_DHCP6_HEADER))))
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- {
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+ if (IS_INVALID_PACKET_CURSOR (PacketCursor, Packet)) {
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return EFI_INVALID_PARAMETER;
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}
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@@ -941,14 +936,14 @@ Dhcp6AppendIaOption (
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}
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//
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- // Fill the value of Ia option length
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+ // Update the packet length
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//
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- *Len = HTONS ((UINT16)(*PacketCursor - (UINT8 *)Len - 2));
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+ Packet->Length += BytesNeeded;
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//
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- // Update the packet length
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+ // Fill the value of Ia option length
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//
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- Packet->Length += BytesNeeded;
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+ *Len = HTONS ((UINT16)(*PacketCursor - (UINT8 *)Len - 2));
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return EFI_SUCCESS;
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}
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@@ -957,6 +952,7 @@ Dhcp6AppendIaOption (
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Append the appointed Elapsed time option to Buf, and move Buf to the end.
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@param[in, out] Packet A pointer to the packet, on success Packet->Length
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+ will be updated.
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@param[in, out] PacketCursor The pointer in the packet, on success PacketCursor
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will be moved to the end of the option.
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@param[in] Instance The pointer to the Dhcp6 instance.
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@@ -1012,9 +1008,7 @@ Dhcp6AppendETOption (
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//
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// Verify the PacketCursor is within the packet
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//
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- if ( (*PacketCursor < Packet->Dhcp6.Option)
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- || (*PacketCursor >= Packet->Dhcp6.Option + (Packet->Size - sizeof (EFI_DHCP6_HEADER))))
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- {
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+ if (IS_INVALID_PACKET_CURSOR (PacketCursor, Packet)) {
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return EFI_INVALID_PARAMETER;
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}
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--
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2.39.3
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