Multiple integer overflows in TrueCrypt 7.1a allow local users to (1) obtain sensitive information via vectors involving a crafted item->OriginalLength value in the MainThreadProc function in EncryptedIoQueue.c or (2) cause a denial of service (memory consumption) via vectors involving large StartingOffset and Length values in the ProcessVolumeDeviceControlIrp function in Ntdriver.c.

The ProcessVolumeDeviceControlIrp function in Ntdriver.c in TrueCrypt 7.1a allows local users to bypass access restrictions and obtain sensitive information about arbitrary files via a (1) TCIOCTLOPENTEST or (2) TCIOCTLGETSYSTEMDRIVECONFIG IOCTL call.