CVE-2017-3226
Published: 24 July 2018
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
Author | Note |
---|---|
mdeslaur | xenial doesn't build with ENV_AES, and later releases removed the code completely |
Priority
Status
Package | Release | Status |
---|---|---|
u-boot Launchpad, Ubuntu, Debian |
impish |
Not vulnerable
|
jammy |
Not vulnerable
|
|
xenial |
Needed
|
|
bionic |
Not vulnerable
|
|
focal |
Not vulnerable
|
|
groovy |
Not vulnerable
|
|
kinetic |
Not vulnerable
|
|
lunar |
Not vulnerable
|
|
artful |
Ignored
(end of life)
|
|
cosmic |
Ignored
(end of life)
|
|
disco |
Ignored
(end of life)
|
|
eoan |
Ignored
(end of life)
|
|
hirsute |
Not vulnerable
|
|
trusty |
Does not exist
(trusty was not-affected [code not present])
|
|
upstream |
Needs triage
|
|
zesty |
Ignored
(end of life)
|
|
mantic |
Not vulnerable
|
|
Patches: upstream: https://github.com/u-boot/u-boot/commit/c6831c74a9e9dbedc351de94d23d35188ae1a39b |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.4 |
Attack vector | Physical |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |