CVE-2017-3226

Das U-Boot is a device bootloader that can read its configuration from an
AES encrypted file. Devices that make use of Das U-Boot’s AES-CBC
encryption feature using environment encryption (i.e., setting the
configuration parameter CONFIG_ENV_AES=y) read environment variables from
disk as the encrypted disk image is processed. An attacker with physical
access to the device can manipulate the encrypted environment data to
include a crafted two-byte sequence which triggers an error in environment
variable parsing. This error condition is improperly handled by Das U-Boot,
resulting in an immediate process termination with a debugging message.

Notes