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) TC_IOCTL_OPEN_TEST or (2) TC_IOCTL_GET_SYSTEM_DRIVE_CONFIG IOCTL call.

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.