From: Ruiyu Ni <ruiyu.ni@intel.com>
To: edk2-devel@lists.01.org
Cc: Jiewen Yao <jiewen.yao@intel.com>, Star Zeng <star.zeng@intel.com>
Subject: [PATCH v2 10/12] MdeModulePkg/UsbBus: Deny when the string descriptor length is odd
Date: Tue, 16 Oct 2018 13:43:33 +0800 [thread overview]
Message-ID: <20181016054335.47460-11-ruiyu.ni@intel.com> (raw)
In-Reply-To: <20181016054335.47460-1-ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
index 9fc6422ab1..22b6a9d661 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
@@ -655,7 +655,13 @@ UsbGetOneString (
//
Status = UsbCtrlGetDesc (UsbDev, USB_DESC_TYPE_STRING, Index, LangId, &Desc, 2);
- if (EFI_ERROR (Status)) {
+ //
+ // Reject if Length even cannot cover itself, or odd because Unicode string byte length should be even.
+ //
+ if (EFI_ERROR (Status) ||
+ (Desc.Length < OFFSET_OF (EFI_USB_STRING_DESCRIPTOR, Length) + sizeof (Desc.Length)) ||
+ (Desc.Length % 2 != 0)
+ ) {
return NULL;
}
--
2.16.1.windows.1
next prev parent reply other threads:[~2018-10-16 5:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-16 5:43 [PATCH v2 00/12] Need to validate data from HW Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 01/12] MdeModulePkg/UsbMass: Merge UsbBoot(Read|Write)Blocks(16) Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 02/12] MdeModulePkg/UsbMass: Fix integer overflow when BlockSize is 1 Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 03/12] MdeModulePkg/UsbBus: Fix out-of-bound read access to descriptors Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 04/12] MdeModulePkg/UsbBus: Reject descriptor whose length is bad Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 05/12] MdeModulePkg/Usb: Make sure data from HW is no more than expected Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 06/12] SourceLevelDebugPkg/Usb3: Make sure data from HW can fit in buffer Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 07/12] MdeModulePkg/UsbKb: Don't access key codes when length is wrong Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 08/12] MdeModulePkg/AbsPointer: " Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 09/12] MdeModulePkg/UsbMouse: " Ruiyu Ni
2018-10-16 5:43 ` Ruiyu Ni [this message]
2018-10-16 5:43 ` [PATCH v2 11/12] MdeModulePkg/Bus/Ufs: Ensure device not return more data than expected Ruiyu Ni
2018-10-16 5:43 ` [PATCH v2 12/12] MdeModulePkg/UsbMass: Reject device whose block size is 0 or > 64K Ruiyu Ni
2018-10-17 2:43 ` [PATCH v2 00/12] Need to validate data from HW Zeng, Star
2018-10-17 2:46 ` Zeng, Star
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