File freerdp-CVE-2022-39319.patch of Package freerdp.31491

Overview Repositories Revisions Requests Users Attributes Meta

File freerdp-CVE-2022-39319.patch of Package freerdp.31491

From 52640ce3fd83665cadd92cb8af322d34ed530dea Mon Sep 17 00:00:00 2001
From: akallabeth <akallabeth@posteo.net>
Date: Thu, 13 Oct 2022 08:47:51 +0200
Subject: [PATCH] Fixed missing input buffer length check in urbdrc

(cherry picked from commit 497df00f741dd4fc89292aaef2db7368aee45d0d)
---
 channels/urbdrc/client/data_transfer.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/channels/urbdrc/client/data_transfer.c b/channels/urbdrc/client/data_transfer.c
index f33b0f3b0..b067637aa 100644
--- a/channels/urbdrc/client/data_transfer.c
+++ b/channels/urbdrc/client/data_transfer.c
@@ -241,6 +241,10 @@ static UINT urbdrc_process_io_control(IUDEVICE* pdev, URBDRC_CHANNEL_CALLBACK* c
 
 	Stream_Read_UINT32(s, OutputBufferSize);
 	Stream_Read_UINT32(s, RequestId);
+
+	if (OutputBufferSize > UINT32_MAX - 4)
+		return ERROR_INVALID_DATA;
+
 	InterfaceId = ((STREAM_ID_PROXY << 30) | pdev->get_ReqCompletion(pdev));
 	out = urb_create_iocompletion(InterfaceId, MessageId, RequestId, OutputBufferSize + 4);
 
@@ -720,6 +724,15 @@ static UINT urb_bulk_or_interrupt_transfer(IUDEVICE* pdev, URBDRC_CHANNEL_CALLBA
 	Stream_Read_UINT32(s, TransferFlags); /** TransferFlags */
 	Stream_Read_UINT32(s, OutputBufferSize);
 	EndpointAddress = (PipeHandle & 0x000000ff);
+
+	if (transferDir == USBD_TRANSFER_DIRECTION_OUT)
+	{
+		if (Stream_GetRemainingLength(s) < OutputBufferSize)
+		{
+			return ERROR_INVALID_DATA;
+		}
+	}
+
 	/**  process TS_URB_BULK_OR_INTERRUPT_TRANSFER */
 	return pdev->bulk_or_interrupt_transfer(pdev, callback, MessageId, RequestId, EndpointAddress,
 	                                        TransferFlags, noAck, OutputBufferSize,
@@ -803,6 +816,13 @@ static UINT urb_isoch_transfer(IUDEVICE* pdev, URBDRC_CHANNEL_CALLBACK* callback
 	packetDescriptorData = Stream_Pointer(s);
 	Stream_Seek(s, NumberOfPackets * 12);
 	Stream_Read_UINT32(s, OutputBufferSize);
+
+	if (transferDir == USBD_TRANSFER_DIRECTION_OUT)
+	{
+		if (Stream_GetRemainingLength(s) < OutputBufferSize)
+			return ERROR_INVALID_DATA;
+	}
+
 	return pdev->isoch_transfer(
 	    pdev, callback, MessageId, RequestId, EndpointAddress, TransferFlags, StartFrame,
 	    ErrorCount, noAck, packetDescriptorData, NumberOfPackets, OutputBufferSize,
-- 
2.35.3

Places

File freerdp-CVE-2022-39319.patch of Package freerdp.31491

Places